Personally I would park that boat until all legal actions have been resolved. Did you ever seek a claim against the person that that caused the DUI accident ? It is sad that there our mechanic's taking advantage of honest people like yourself.
You now have some tough decisions, the cost to bring that boat up to you expectations may not be worth the investment, you may be better off purchasing another Carlson. With a budget of 3k - 4k you can get into a Carlson, probable not a CVX18 but for sure the 16's and 17's.
Good luck to you.
Joe