I've slept on the cement beds and I have seen the cement furniture. We are thinking about adding a bath. Are bathtubs available or can we get one built with cement? Is that possible? We figured since our case already has 3 walls in the back that we might as well add on and make a master bed and bath. I don't want one of the flimsy tubs that some of the resorts have in them, you know, the flexible ones that might collapse!