I just grabbed a 28 foot (30 foot with V-nose).
It was a cheaper brand, but built well enough for my needs.
Picked it up in Ga. for the best price. I plan on adding living 1/4's in the front (full bath/kitchen area/fold down bed).
I did buy an extra horizontal window to be installed after "kitchen" is built.
I also grabbed two 4' x 8' extra outside panels, in case I ever bang up the exterior.
Goal is to be able to do track or offroad weekends with no "camper" or hotel required.
I also plan on stuffing my 6K lb full size offroad Bronco in it, so I upgraded a lot (and it is really tall).
I do have a 23 F250 w/6.7 PS and plan to be about 12K total if/when Bronco is onboard.
I went with two large side doors, as I was not sure on placement of vehicles, and it could change with
different vehicles. This was my total build and prices for options, just to give you an idea.
One thing I was surprised at this price point, was axles and even wheels and tires were all
made by Dexter (one of the top supplier of trailer axles). BTW, everyone says they are
going to tow "slow", but I'm glad these stock tires are rated speed rated for 83 MPH
(obviously I am not doing that

).
They have a price "configurer" you can use to get an idea of what options cost, and
try to compare to any local dealer on price (maybe save a trip to Ga, which was a PIA,
I admit)