As far as water use and disposal while using TT as guest house, there are ways to deal with it. I am not sure what the regulations are for where it will be located, but when I use my TT on our family farm (with no connections other than elec), I use gray water for watering trees. At my house, in another rural GA county, I use gray water for landscape watering, When at farm, I bring black water out and dump at nearby park or other dump location. At home, there is a park less than a mile down the highway from me, that charges me $3 to dump. It takes a long time to fill black tank, so I just hook trailer up and haul to park to dump. It takes a lot of $3 dumps to equal the cost of the macerator, and I don't think hooking up is that much more difficult than running the macerator and hose across the yard and drive way more than 50-60 ft. My JAYCO has a 32 gal black tank which is really a lot and takes a while to build up. I have never filled it except by adding extra water. Granted I don't have small children, but have used it several weekends with 2 adults and not come close.