With regards to hot water, we mostly wet wipe it and find we can get completely acceptably clean this way. Even when we have showers at our disposable we often find we're just too lazy to go through the trouble. We don't really have the thing set up to shower inside, we have enjoyed an outdoor shower or two when we're in the country. We've found that the heat from the engine cooling system plus the insulation from the water heater can give a shower or two worth of hot water by itself. Obviously this requires that you drive it. When we're traveling, we're driving a ton, so this isn't a problem, when we're stationary, we go to our home gym to work out and shower there.
For money, I've been doing freelance writing on Elance. I also have some investments that pay enough out each month to cover our base costs (gas, meals all cooked on our own, insurance, etc) we use the extra to do fun stuff. Aly is a singer and model and gets paid for those things sometimes. The key, as Tynan has preached, is reducing expenses to the point that you can afford to get underpaid for stuff you love.