Condition of brakes
and wheel bearings is a very good thing to know. Few things can leave you in a more desperate situation than a breakdown due to overheated bearings. There are so many "system" things that need or will need attention and periodic or seasonal maintenance. To cross reference the pot hanger which you asked about on another thread, you can sometimes do some exploration in a Burro
(under the sink, at the back of lockers, thru external vents, at fan openings with the interior trim bezel removed) to determine roughly what space you have between inner and outer shells. I'd say it runs the range of 1 to 3". Nice as it is to be able to do remedial or addon wiring inside that cavity rather than under "rat fur" or in surface wiring channels, the insulation can hamper the ease with which you can get a wire snake between one location and another.
I don't have major maintenance tips but here's a very useful minor one. Your rig appears fron the pictures to be in excellent condition. It is ONLY 14 yrs. old. Never assume that yours is the MOST deteriorated trailer on the planet. Many things that look bad are mostly grunge and inevitable superficial wear. Let's say you get a minor window leak. DO NOT automatically assume that you must remove and rebed windows
because others are doing so or recommending doing so. I had a persistent minor leak from the rear slider window in our Burro. I got it only during heavy rains. I got tired of folding the memory foam mattress and piling cushions to the opposite side of the trailer. It finally occured to me that shrinkage at the lower mitre in the gasket material on the fixed pane might be introducing a rather large and continuous sheet of water into the drain channel. Retrofit with new gasket would be the optimum solution of course but I resorted to a bit of leftover butyl rubber putty tape pressed into the gap and later color matched to the black gasket and window frame w/ MagicMarker. Our rains have come about a month later than usual this spring and I have not had a drop of water inside in May. I don't recommend "quick and dirty" but sometimes you can finesse with "cheap and cheerful." Hope you folks enjoy your Burro.