Chook, I assume it was the elder's garage. I hate to say it but I would have been leery of even another believer sleeping in my garage if I didn't know him. A stranger is a stranger. But, if it were a group of fellow witnesses on a KH build or something, then that would have had some structure and recourse if something negative happened. Its not always as simple as it sounds.
One brother I know of saw a truck stuck on the side of the road. It was a man and his family heading to Arkansas. (We are in California). The man needed money to get his family there so he gave the brother the pink slip to the truck as collateral and the brother used his credit card to buy bus tickets for the family. (around $500.00) Not only did the brother NOT hear from them again, the engine was blown on the truck and he was stuck with it. Doing nice things for others? Not always wise.