This. Also, the 5 minute setup time is a lie. By the time you properly dock, stabilize and disconnect (~20 min)...there will be 'stability' and 'are you sure we are level' questions. I picked up a camper which I could stop, change a diaper while the bigger girls visited the toilet, wash up and prepare a snack for all without unhitching or performing any other setup during stops.Everytime I see it my inner monologue reads “one shower s***ter combination” in Slim Pickens voice like when he reads out the list of emergency rations in Dr. Strangelove.
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I like the Casitas, but the better half vetoed a wet bath, such as these offer. If you've used one, you'll know why. Seperate shower/tub from toilet/sink is always a plus.
Last, though I love mine...campers are garbage. Better said, campers are accomodations that for a short time perform as advertised. No trailer-bound abode/lavatory will survive moderate to severe travel without appliances/fixtures coming loose over rough miles. You will find loose screws after every trip. Blind rivets are handy. You'll invest much more time in it than your GX without noticing.
I would consider buying a modest 17-20' travel trailer and picking up a small airplane or second GX with the difference in cost.