You have two cows...
The problem with those advocating "sharing", is that they usually aren't the folks who worked to obtain the objects in the first place, and when they "borrow" from their "friends", they fail to take proper care of said object.
Private property rights are a good thing - they encourage someone to take stewardship, rather than shrugging and expecting someone else to do the care, feeding and maintenance.
I'm all for renting in lieu of buying, for intermittent needs, and we buy used where practical. But communal ownership always disappoints.