We have been full-time for a bit over four years.
We pull a 36' Flagstaff TT with a Ram 2500. Frankly our TT weighs too much and has too high a tongue weight for my F-150. We've traveled over 30,000 miles in this trailer from Texas to Key West to Maine to Texas to Utah to California to Texas to California to currently Oregon - Monday to Washington and within a month to BC.
Some Pros and Cons of a TT
Pro - lower clearance, easier to maneuver in some tight campgrounds because the turn cut of the rear wheels is not as sharp, lower profile when traveling in windy conditions
Cons - limited storage capacity - we have a topper over the bed of the pickup so that my tools, out door stuff like lawn chairs, and such - are safely secured. The only external storage on the TT is an area about 1/2 of the space under the bed. Barely holds water hoses and electrical connection stuff.
Weight limits - the TT has a much lower total weight than a 5er. Part of that is good because I can have a bigger trailer with more internal room, part of that is bad because it takes a bigger truck to safely pull the TT. A 5er would have a higher carrying capacity (i.e. my stuff) than almost any TT.
As a full-timer, you have to constantly watch weight. Be rigorous about not buying souvenirs, extra things, extra clothes, etc.
I weight my rig every three or four months - total weight, per axle weight and without the trailer weight so that I know exactly the tongue weight and the total trailer weight.
For folks who say you don't need a larger trailer - true. I met a couple once who traveled for over 9 years in an 18 ft Casita. When they had instances like we are having right now on the coast of Oregon with the fourth straight day of rain, and temps in the mid-40s at night and mid-50s in the day time - they spend their days at the library. They didn't have room in the TT to spend a rainy day. We sit back comfortably in our recliners, watch a little TV, update our family and friends on the internet, make day trips, take long comfortable showers, cook a nice dinner and sit down at a table to enjoy it.
When my wife was ill last winter in Las Vegas, I was able to sleep comfortably on my recliner and not bother her in the bedroom. Having a separate bedroom and living room is very useful.
Just some considerations.
As a full-timer you will not be able to avoid camping in bad weather, you will be stuck in the rig when the weather is too bad to travel. You have to be flexible.
Full-Time 2014 - ????
โNot all who wander are lost.โ
"You were supposed to turn back at the last street."
2012 Ram 2500 Mega Cab
2014 Flagstaff 832IKBS TT