I full time with my dog in a TT and friends that stay on the weekends, it's a 31 footer. I've been living like this for over a year and love it. I have plenty of storage in my trailer. All my tools I keep in my truck, I have a cap on my bed. The perk is if I break down or any of my buddys do while we are on the trails, all my tools are close at hand. I went with a TT because I didn't want to spend more to heat or cool the RV. In southern Utah cooling a RV can be a chore. Same thing goes if I'm in Montana a little longer than usual, heating becomes a chore, in my TT my bills stay low. The biggest plus for me is getting back into those beautiful quiet spots tucked way in the back at national parks and BLMs where you just can't fit a fiver.
Some will argue that you have more room in a fiver. RVs come in different lengths with a choice of how many slides but they are only 8 foot wide. It boils down to how much head room you want, I'm 6'4" and have no problem in my TT. IMHO, the only differences between a fiver and TT are, where you store your stuff, head room, and pin vs equalizer hitches. I say go for it, get out there and start having fun and in a year or two you can always trade up.
Disclaimer, this is only an opinion.