Sounds perfect for a Vehicle Wrap. The design is done on a PC. You would approve the design / size. The wrap company would then print on vinyl full size. The vinyl is then applied to your clean, wax free RV. Done.
then, when you sell it, it can be removed with a heat gun without damaging the original paint. Do a Google search...these places are all over the place now.
2002 Newmar Mountain Aire Limited 4370 w/ Spartan K2 and Cummins 500hp
ASE Master Certified (a long.....time ago...)