As for the airframe that includes removing all the inspection panels, interior trim etc and refitting it after. Jacking the aircraft up (and lowering it after), removing all the wheels, regreasing wheel bearings, battery, instruments, filters etc etc. And you can't inspect anything until it's clean.
At £45 or £50 quid an hour it makies huge sense to try and find a way to help with this kind of stuff yourself as an owner. Unless you have ££££ that is.