Welcome back. I think you could make it work, especially with some reference referrals and examples of work to show. Great way to see the USA. Are you thinking like a toy hauler or garage MH with a work area set up inside? Or pulling a trailer with the equipment and supplies inside? Having some basic supplies is required, but most bigger city areas should have plenty of basic upholstery supply businesses. I would not try to do work a the big shows, but rather use that as the advertising and setting up some scheduled times and routes. I bet you could be on the road as full-timer in the RV and have more than enough work to support your travels.