Hi JPSCasita. You mentioned dealers, but new Casitas are only sold direct from the factory in Rice, Texas. Their website contains a list of standard and optional equipment, so I would start there. There are also a couple of Casita-specific forums you will want to check out.
I know for a fact that there are a lot of Casita
owners in Texas, if you contact the factory they can put you in touch with a local owner in your area that can show you their trailers.
I have a 2015 17 SD so feel free to send me any questions. The deluxe models include a bathroom are well-equipped out of the box, but depending on how you want to use it many of the options make a lot of sense - awning
, A/C, lift kit, etc. etc.
Plan on waiting a few months to take delivery after you place an order.