I am not a full-timer YET. You have a son, that must go to school. Are you planning on staying in one place during the school year? Motor homes need to be driven, not parked. Are you going to home school? Why a motor home if you aren't going to move very often. Hope you are keeping a vehicle to get groceries with and run to the store, and one you can tow with the motor home.
I am not trying to shoot down your dream, I am just asking questions you need to ask your self, and would help us if you answered them here for us.
2012 Ford F250 ext. Cab 4x4
2002 Jeep Wrangler Sahara
2008 Yamaha V-Star 650 Classic
2008 Work and Play 18LT