I'm not PC and not cranky, I hope you realize that it is more than buying a used rig and blaming everything that goes wrong on the brand itself. I'm compelled to write because it bothers me that someone jumps on a forum and unabashedly trashes a product that I have invested good money in. The results are to run down the value of my rig that I intend to resell someday. I meticulously maintain my rig utilizing information I get on this forum and from other sources. If you buy my rig used you will be getting value.
I have a thermometer in my rig that records the high temps and low temps each 24 hours, unattended, In Texas the rigs reach incredible interior temps in the summer. In the winter they reach extreme lows. Your cabinets are peeling and chipping from exposure to this weather most likely from condensation that forms when hot humid air is suddenly cooled. Almost everything you described is a normal maintenance issue or can be prevented.
One scenario that presents itself is that typical RV owners do not maintain their rigs properly, if you bought a used one, I can lay odds that it was not EVER maintained prior to your purchase. I have learned many things on this forum. I would have otherwise neglected them. There is a high likelihood that your rig was not prepped for you by your dealer.
Dealers range from excellent to excellent schiesters. If you cannot do maintenance on your own, you really need to make sure your maintenance tech is excellent. That lube job that an owner bought for $200 may have been anything from nothing to shooting way to much grease in with a pneumatic grease gun. One is stealing and the other is ignorance. And $200 for a lube job is way too much anyway, unless of course it is a R&R hand pack with new seal included.
15,000 lb industrial sized equipment, not a toy. Your rig requires maintenance prior to use and storage. There are items that are too many to count that need to be inspected and adjusted. Bearings must be lubricated, the absolute best is clean inspect and hand pack, after that it's lube at regular intervals, the repeat process again. My rig is a 2014 and I bring it to the house at least 4 days before departing, for inspection, cleaning and adjustments and repairs if required. Over those 4 days I expect to spend at least 20 hours performing those task and any mods that I want to make. It is 2 year old, and yes I have to do things to it.
Dealer "catch 22"/endless loop. I bought my rig and have never taken it back to the dealer or any other dealer for that matter. One of the reason why is that I have never found anything that rates the cost of hauling that thing to a dealer, I would just as soon repair it myself rather than having a highschool kid with a screw driver messing with my rig. Plus that I have rarely heard of a dealer that gets you in and out. I personally believe that dealers can introduce more problems than they can solve. You take it in for a simple repair, they disconnect the batt to do the repair, then they arc the contact or cross wire it then your charger blows a fuse that you discover after getting the rig back to your house. Or in one case of an owner on this forum, a dealer dropped the man's BRAND NEW rig causing major damage and several months in the shop. Many times the issue is not repaired at all, entire vacations are messed up because of bad repairs. Me I have not had one major problem, and no warranty repairs. I'm so comfortable with my rig, i cashed in my extended warranties when I figured out that there were no boogie men behind the basement walls.
What is the matter, and what you were told the matter was, are many times two different things, many dealers and shops tend to oversell, I have heard of some extreme chump prices, and issues that just don't sound right. Many RV owners have money, and they are willing to spend it, which makes dealer service departments inflate prices and perpatrate frauds. Owners come from all walks of life, many have no comprehension of what an inflated price would be, they are chumps. I don't mean any malice by that statement, I just mean that there are people that can recognize the value of a repair and not overpay, and those that can't. those that cant drive up the price to the point that I wont pay it, so I do it myself, I can do it better anyway.
As far as the factory is concerned; After my warranty expired, I lost a light lens, all I wanted from Heartland was the manufacturer name of the lens. He told me that he would check it out and get back to me. A couple of days went by, and I began wondering when he was going to call me back. I was getting ready to call again when the doorbell rang. It was a UPS box ($10 freight) with the correct lens in it. I did not expect that at all, I did not even ask for that. I fully expected to buy the lens for an internet source, not get it for free. Just a lens, agreed. But it is the thought that counts. A lot went into that customer service person arranging to send it to me.
As far as the tires go, 15k lbs on 4 tires is an issue for all of us, which requires a lot of study. If those were OEM Towmax tires you got better service than most people do. My brand new ones let go at 1800 miles, many have gone in less than that, some people have gotten better service, it just all depends. But Heartland offers one of the best tire for that application, the Goodyear G614, it was optional for your rig, the Towmax is not even in the same league. But you could not have known that since you bought your rig used, and your dealer did not inform you that new and better tires were needed. Your issue over the tires is strictly between you, towmax/tire manufacturer and your dealer, IMHO. Have many of us been snagged by the Towmax ST tire problem? Yes, but like you we were unaware of the ST tire issue, and that the option was available from heartland for the G614. Had I known there was an issue I would have never had a blowout, at least a Towmax blowout, not really Heartlands fault, well... maybe a little. But no matter what you do, you will always need to be looking at your tires for problems, your tire problems are not behind you so to speak, the are ahead of you. ALWAYS
A word about tires, we fiver drivers always blame the tires, and rightfully so in the case of the Towmax, but many times we forget the curbs, chug holes, and those pesky tight turns that we make when forced into a corner, or making a difficult parking maneuver. You know, the ones where the tire is about to roll off the rims? All that is detrimental to tires. We forget about what happened last year, and blame the tire for what happened this year. In your case you could not have known what your tires had been through, because you bought used, and did not at least buy a new set of tires for your rig before starting out on your adventure.
What I describe above is the difference between rigs, it is the patina they develope, whether you buy new or used, you must make it your own by performing the mods and repairs that make it work for you. You must anticipate problems and look for them. I once had an airplane that was 48 years old. I had to have it inspected every year, and repairs had to be made on a regular basis. My life depended on it. 48 years old today it is 63 years old. Go look at the tarmac of a small airport, there are neglected airplanes that were airworthy when they were parked, now their tires are rotted, their interior is rotten and the paint is faded. Why? Neglect, my airplane is still in the air 63 years after it was built. There are newer planes abandoned all around the USA.
BTW, When buying used you must take a close look at what you are buying. If I were buying used, I would buy from an individual who could tell me and show me everything that he has done, and what he does to keep it maintained, I would interview him. Once I was confident that he was competent, I would consider purchasing from him. An individual will have a box of stuff to give you, such as screws, parts, grease, and a box of service records. A dealer might be selling you a repossessed piece of junk, the salesperson is lying if he knows the origin of the rig unless he took it on trade himself.
Be kind to us Heartland owners, and dont run down our rigs. Its your rig that is causing you problems not ours. - Just saying
Having a great time with my Heartland BC3650RL, and everyone that I show it to wants one, and it ain't for sale.