rewiring is not as easy as it sounds - sodder all connections, coat with Noalox anti-oxidant joint compound and then heat shrink with rubber covers. Replace grounding & buss bars and examine and test all sending units and / or guages. Done right, the bill will start growing past the $1,800.00 quoted. If you were selling your boat tommorrow you would not get a penny more for it with the new wiring! The next time you go out the gas tanks can crack and need to be replaced. It never ends with an older boat!
Reading your numerous posts it appears you have had many problems. How many days off have you been unable to boat. How aggravating is that. Every breakdown has a cost in time, aggravation and money. The high price of a new boat can be offset by your financial plan. You know the exact cost of boating a month. Excluding routine maintenance, which should be the same new or old, the cost stays at "x" dollars a month. if something breaks it goes to the dealer @ no cost to you. You have no financial worries and in your cliamate should be able to turn the keys and go whenever you want!
I checked out your website. It was nice to see the picture of you versus the posts. After looking at your website, send your wife in to purchase the new boat. If she cannot get the best possible price - noone can! Good luck, go NEW !!!!