A Blank Sheet Of Paper

Suppose that you had no previous camping equipment and had decided to buy a medium size Trailmanor to use during retirement. Trips would vary from a 10,000 trip to Alaska to a 100 mile trip to the beach or mountains. There would be some dry camping but most would be full service camping. When "customizing" the trailmanor at the official Trailmanor site what would you have Trailmanor supply as options? What would you make sure that the dealer provided (batteries, propane tanks, etc.) and installed? What would you buy at Walmart? I know that this depends on many variables but I think that for some things that it would be cheaper or better to let the manufacturer do it, somethings are better installed by a dealer, and somethings are cheaper and the variety better at Walmart.