For places I've lived (condo) with shared locked bike storage, if there was a fee it was rolled into the whole fee for whole building.

But then I don't know if there ever was. It was simply part of our common amenities.

I wouldn't get hung up on this but it will cost something to set it up in first year.

After living in 3 buildings with bike parking, advice as follows:

*have keyed or security card access
*can have it caged but that's better in secured indoor car parking area
*bike racks be on ground, not forced to hang up bikes. Lots of people can't deal with that. I can't.
*if too many bikes pile up you might have to do a cull by notifying everyone in building that everyone pick up a tag to attach and claim their bike. Rest not tagged be set aside for a few wks., then donated. (this will happen.)
*keep it simple
*park at your own risk with key, etc.
*bike owners be advised to lock against bike rack within bike locker or caged area