Cron/goose boy
Did my PPL with a school, got to know them, volunteered to help at pleasure flying events, weekends etc and they have let me take the machine for maintenance during my PPL, with an instructor, and after completing my PPL - both for no charge. The machine has to go there anyway so they didn't charge me.
Not suggesting its ideal but in my situation as a low timer every free hour I can get I will - plus it keeps me out of the pub on a Saturday afternoon!!!