Full-timing in a TT.....where should I start looking?

I'd go for a 4 Season unit (Lance again has an excellent lightweight TT that can come as a 4 Seasons)

I was not aware that Lance made trailers that were designed for full time RVing. Page 58 of the 2017 Lance travel trailer owners manual states that the trailer is made for 'recreational use and short term occupancy'. 'Four seasons' is not the same as full time RVing. In fact if a full timer follows the seasons the need for a true four season coach is diminished.