I think Rod1 has pointed you in the right direction. I know of a case where a young man bought a nominal share in a vintage tail-dragger (permit)
He joined the club and was able to use an instructor from the school Presumably, they added their profit to the charge-rate for the instructor.
Instructor got work and a nice change from spam-cans,
School made a profit on Instructor's hours andkept their full fleet capacity for their own studes/hires
miladdo saved a lot ,got a cheap PPL and learned to fly
At present, your difficulty may revolve round the recession. A school that's "quiet" will want to be renting-out their own Planes and facilities.
Quite honestly, expecting to use their facilities/ATO status etc. without them making a decent profit out of you, is not realistic.
Yes , you can potentially save a good chunk,but don't get greedy!