You need to widen the universe of competition when you price parking. The universe of competition for an empty parking space is not just "everyone who would want to park here for a day" it is also "all alternative land uses to parking, including housing". A more profitable, and thus more efficient, use of the land would convert likely 99% of all BART parking land to apartments, retail and office space.

Mid-rise subsidized-affordable housing (what will realistically make it through the community's discretion, if anything at all) isn't that efficient.