My advice, based on what you've said ("not a rich man") is to try to sell this car, or this car plus the parts car to someone more skilled and just get a different car. The reason I say this is because you could dump a bunch of money into it, then get discouraged/overwhelmed, or run out of money, and then you won't get that money back when you sell later.
Instead of spending all that money fixing this car, I strongly suspect you'll reach your goal a lot sooner and a lot cheaper by just cutting your losses, and starting to save for a done car, or at least something much more done. The only reason I would not do what I'm suggesting is if this very particular car was the exact one you want. Like it has family history, or it's a 1 of 1 car with an option that means a lot to you, or something like that. Otherwise, it's just a car. Make it easier on yourself, save yourself the heartache and headache, not to mention damage to your wallet.
EDIT: I like 67Dart440GT's idea too, if you have the space to keep this car in the corner (inside) somewhere.
