Other than the excellent advise and details from Jimmy-T above, I would think that if common property is only available to one (or a subset) lot owner, then rent should be payable. So over and above the costs for returning the state of the building back to what it was (tile to carpet) there should also be a rental payment for the parking spaces to cover the period of time that they had exclusive use. Try posting up a sign asking to rent a car space in the building, and see what prices you are quoted, then use that as the value that these owners should pay (to the owners corporation).
Hopefully you can get sufficient numbers of owners to vote with you.
PS, as an absentee owner, you might like to setup a private facebook group, whatsapp group, or similar so that all owners (and/or residents, we have two separate facebook groups), to discuss and organise things. Right now, that is to fix your committee and building issues, but it can come in handy even in a well functioning community, whether it’s to borrow a ladder, or let someone know they left their headlights on etc.