You might want to contact the RV Consumer Group, www.rv.org. As I remember they recommend either Class A or 5ers for full timing depending on whether one travels a lot or just stays in place. They don't recommend TT for that severe service.
If you spend a few cold/hot nights in my TT (one of the better ones I think) and listened to the furnace/A/C noise you would get a better idea of why you wouldn't want it for full timing. The RV Consumer Group has more info on this subject.
You will now hear from TT owners who full time and love it. The difference is that those owners FT in their rig but their rig is not made for full timing.
Keep in mind that some people live in their cars but they, also, are not made for that use.