how much $$$ to restore a car

I am able and willing to do as much work to the car myself as I can. I understand that in the end of the build its not about who's is the best its about your hard work and efforts to get to finish it and that's what I wanna do and have already started I am slowly converting the interior from green to black. Just three days ago on my way up to san Francisco I met Karen on here parting a duster out and picked up a nice dash pad for 40, last yr I drove 4 hrs round trip to pick up a front bench seat with the split black very nice for 125 I met him threw craigslist. Those are some examples of what ive got so far I do drive this a couple day a week it has a fresh 318 I built my self ex the machine work that took one yr and next month I plan on getting a b body 8 3/4 rear from the mopar spring fling and swap that into the duster. An a body one is too expensive lol then my next project would be from auto to 4speed swap so as I do these little projects one at a time I think will be much easier and better then all at once cause I can still drive it and save up for a next little project then the last project would be disassemble and paint.