we full time in a 33' Class A with 2 slides and one bathroom and have never had a problem. We have plenty of room. We have found that when people visit (except family of course) they don't use your bathroom. They either use their bathroom in their own RV or use the campground bathhouse. It's just my preference, but I wouldn't use a dishwasher. Although they use very little water, remember everything you wash has to go in the holding tank. If you want to camp where there are no hookups you need to be able to conserve water and electricity and what goes in the black and grey tanks so you don't have to dump as often. I do use my washer-dryer sometimes. Big living area more important than big kitchen. We cook less in the RV. We eat more simply prepared meals or grill out. We use paper plates to conserve dishwashing. As far as tools go, he only has one tool box of necessary tools. Remember that weight is also important.