To your exterior maintenance concerns, the best you can do is store it out of the weather when not using it. Presuming its a weekend, couple vacations a year typical usage, the other 9-10-11 months a year you're not using it is the most important consideration. Store it indoors, under roof or at least under tarp/cover will reduce your exterior maint and repairs to a minimum.
That said, there are a few other areas just as important, like bearings, brakes, water system. Not a huge deal as long as you don't neglect it. And not considerably different between brands IMO.