Agree with the other guys, I couldn't lend a bike out like that. It's a pace for god's sake!! Having an extra bike that's not worth much or that you aint too bothered about is a good idea.
I have an old peugeot surfer mtb that I keep at the mrs stables so I can ride the bike if I go with her. Ride it, put it back in the yard and leave it. If anyone there ever needs to borrow a bike they can use it and I dont worry about it