1) Communal tools never works. 'Maybe' in a bicycle context where you need a handful of tools but not in an automotive context. Just ask ANYONE who has ever been is the position.
2) Real estate. You need to rent a communal space to do real work. $$$$$$$$
For the small stuff you are talking about it hardly seems worth managing it.
Last year I lent Zefy an engine stand, engine lift, jack and axle stands. I'll probably never see them again
That's some heavy %$^^ to move around...