I have a friend who lives on Gun Lake, and he has a old pontoon boat that he wants off his property. Of course I said, yeh, Ill take it. Moving it is not a problem, but it doesnt float on one side, and is in need of repairs. What i want to do is, turn it into a single/or double river raft with swift oars and a small motor. I have welded steel before, but not this thin, any suggestions?