I am considering buying a 1994 20' Grumman Fun Ship. The owner let me take it for the weekend tovtest it out. It has a 70 HP Johnson motor, rebuilt 2 years ago with some choke issues. In addition, when we pulled it out of the water it was evident one of the pontoons was taking water. Finally needs a new steering wire (very hard to turn) and deck carpet. Comes with trailer. Guy will take $1150 for it (down from $1500, he's a friend of my fathers). My overall concern is the leak in the pontoon as it relates to overall safety and cost to repair. Any idea on average cost to weld and pressure test as well as safety after? Seats were recovered 2 years ago as well. Think i am getting a great deal if the repairs aren't too much and boat will be safe. Thoughts?