The main issue with selling the 911 is that you may find yourself priced out of the market down the line. I have noticed that all air cooled cars have really pulled up in price, especially a decent 964 isn't as cheap as it used to be. That said, your asking price seems pretty steep, so that may solve the issue for you, unless you will take considerably less.
I used to tinker with a lot of domestic cars and cheap projects. I have started to value my time however and don't want to throw my labor after a $2k car that's going to be a $2k car at best down the line. On a 911, the effort is much better spent IMHO.
G