Have you also checked into a Scamp
16 deluxe (wood interior version)? Same 54" bed size as the Casita
, but lighter, and you don't have to give up the bathroom.
I personally prefer the side bath/front dinette plan. (The side dinette plan has a funky galley design where the stove overhangs the bed a few inches, which I don't care for, but necessary to accommodate a curbside fridge
along with the larger bed. The side bath plan solves the issue by moving the fridge
to the street side next to the bath.) The side bath is pretty tiny, and you could probably get Scamp
to delete the toilet & shower and use it as a porta-potty closet if you preferred for even less weight
and cost. It has way more galley space than the Casita
. The front can be customized in several ways: storage closet plus dinette/child bed, omit the closet to make a full-width adult single bed/dinette, or sofa/bunks as in the standard version.