Well I know how that goes - working on the car isn't much fun if it takes all of your time and you can't get out to drive it! Gotta say though - every time the bikes are out on track and I see the plumes of dirt go up, I cringe - you're a braver man than I. Good luck to you!
With my job Im home only 2-3days a month so I just have to stay with what I allredy build (racebikes).
To build the car it will take me another 2years or longer