Don't sell that car unless you absolutely are forced to. Slap a car cover on it and let it sit. As long as its inside don't worry about how long it sits. If its years who cares. When life allows later you can get back to it. All the hard work is done. Don't let go of the dream now. You have to keep the vision of what it would be like having it all done crusing down the road. That vision can become reality later on.