Far as I can tell, someone wrote:
we really think this could be a great way to cut our costs,

Sure it is. That's why everyone else does it. NOT!

Try this. Sell your boat. Bank the money. Look for someone to rent you
THEIR boat when they aren't using it. Not too easy, huh?

Anyone wanting to rent your boat will show up looking responsible. What
happens when they use it, get drunk and act irresponsibly? You are
liable, that's what.