Study up on bed size, on Casita
if you really want at least a queen, then only the Liberty will get you there. To get the big bed, you give up seating area, which to me is a poor trade. RV manufacturers are pretty loose with terms on bed size, creating their own definition of queen, twin, and so on. Arm yourself with the real sizes if you want to do a comparison.
Myself, I am not towing a 17 foot Casita
with your Sorento. But others may be OK with it. The newest Sorrentos have up to a 5,000 pound tow rating which would be ideal.
I'd be looking at a 16 instead, which is lighter in weight
, but also lower ceiling. There is a nice, older 17 foot Casita Freedom for sale
right now (not mine). Casitas are known for heavy tongue weight
because of their design. You may well be over the limit on your Kia.
The Casita Spirit and Freedom models both have a side dinette. I had a Liberty several years ago. If I ever did a Casita again, I would go with the Spirit. Smallish bed sizes can be made OK for many people by sleeping in opposite directions (head for one on the curb side, head for the other person on the road side). Its suprising how much bigger a bed will appear by doing this simple change. No place to sit (in the case of the Liberty) would be a non-starter for us.
Weights in the real world show real Casita weights.
17 is another fine choice, much harder to find, and tend to be at the higher end of your budget.