TT: Maintenance

On a "monthly" basis you really don't have ANY maintenance to do unless you have something that is not working correctly. On an ANNUAL basis however, you need to sasnitize your water system, check your brakes and bearings on each wheel, inspect the roof for physical damage and check caulking for signs of deterioration. Pay special attention to cracks and places where caulking is pulling loose from around a through roof fitting. Most everything else is entirely optional but most like to be sure the RV is kept clean for cosmetic reasons and that includes cleaning the roof with a mild detergent that does not contain mineral spirits or petroleum distillates, then rinsing it well. Some was the siding and repaint around safety chains or battery boxes also but those are really "as needed' items rather than annual.
Good luck / Skip