IMO a lot of what is on that list depends on the frequency of use and miles accumulated annually doing so and adjust accordingly.
After jumping into the coach world a few years back here is one thing that never seems to get brought up as far as routine maintenance and seems to play into many of the crazy problems reported here at iRV2 and that is to check every ELECTRICAL related: Nut /Bolt / Screw / Wire nut / gang ground / Power distribution Center / Transfer switch / Circuit breaker panel and the likes
these coaches and all coaches leave at lot to be desired as far as the lack of engineering put into them and the low quality of parts used in doing so. Ive seen from Prevost on down the use of wires nuts...and beyond belief the amount of them used ( to save money) .
Many of the parts used simply are not made to deal with 10k miles a year of shake rattle and roll of bumpy potholed roads and over time the fasteners start to loosen causing electrical component failures or harder yet to find intermittent failures.
I was doing some maintenance one day on my coach and was working in the Circuit Breaker panels and caught only by chance a wire nut that had loosened in the panel to the point it was charred from the arching and to look further their was more than one loose and charred.
I guess what I just said was dont forget annual maintain your electrical connections.