Do any of the boat people you know know of a scout troop or youth organization that could use the rescue of this boat as a project? A boatbuilding/trade school?
Not to sound paranoid, but having dealt with Misters Murphy & Finagle many times, how much 'cushion' do you have in case something goes wrong with the Holiday or trailer?
I see how having a major 'project' boat would give you something to do when the weather is too bad to take the other boat out (N.B. Fix that trailer first!
), but can you afford the time/money sink this free boat will be? Are there projects you could do for your working boat instead?