For my simple single engine EASA aircraft I managed to get the cost of part M as low as possible:
I follow the approved maintenance programme as my own CAMO, then as the owner carry out and release all maintenance tasks permitted under annex VIII. (Pretty well all the work required for 50 hr checks and annuals)
Any other maintenance which I carry out has to be supervised and released by a LAE. This guy issues the ARC each year, gets a fee for supervising my maintenance, and admits that it's not a problem since my in depth knowledge of the aircraft is considerably greater than his.
Constructive interpretation of the regulations helps reduce costs.
Essential however to be able to work on your aircraft where it is hangared ... any restrictions on DIY maintenance by airfield owners is a no no & should be challenged.