Hi Everyone
I too am a newbie, but you are way ahead of me in that you already have a Jayco and have been using it. But here is what I would tell someone, if they were to ask me.
1. YouTube the heck out of each of the subjects that you are contemplating.
2. Get your price online and beat your local dealer up with it, have no mercy.
3. 25% discount from list is the negotiation starting point these days. Aim for 30%!
4. Get a great deal, and put down a large down payment so you are not financing things that wear out (you would not finance a couch or washer dryer for 20 years would you?).
5. Read the truck size problems and opinions on this site. Many (including me) purchased a marginal truck for towing the fifth wheel, it is spilt milk in many cases, just don't let it happen to you. Lots of guys on here that know what they are talking about on that subject.
6. The Onan genset is expensive, but it is even more expensive from Heartland. Buy it off the internet (no sales tax, no freight) and have local install it for you or install it yourself. Since it last a lifetime it is all right to finance an equivelant dollar amount of non durable items such as couches and TV's. The washer and dryer was not even considered in my purchase. If Amy decides she wants one then we will buy one.
7. Consider service policy, "Couches RV Nation" had a great deal for my Big Country and a great extended service plan.
8. Let the dealer finance if you can, they make a little off the note and will make a little off the service policy. If this helps them make me a deal then fine as long as I get some value for it. Its a balancing act.
I hope this helps you or someone else.