I'm considering building a new 2.5 or 3 car stall garage that is disconnected from my main house. I'll be parking 1 car and a Kubota tractor in it. I'd like to be able to do detailing on the side and have the ability to wash the cars inside during the winter months. The garage will be heated and will have a water supply. What accessories should I be thinking of getting to do the detailing and how do I solve the problem of washing the vehicle inside without getting everything wet? Probably won't do it until next year but I like to plan early.