Try doing smaller things that won`t make too much noise or smell.Redoing seatcovers maybe? Anything you can complete no matter how small is one step closer to completing your project. I think everyone hits the wall at some point,you just got to push on through and stay dedicated to your goal!
I can tell you what wont work, at least for me anyway. Renting a garage across town.I ended up paying rent for a place I was never at. With the demands of being a family guy working keeping the grass cut ect,ect my project stalled.I then bought a portable shelter and set it up at my house but didn`t put down a floor. Working on a car and laying in dirt wasn`t cutting it either. So I gave up and sold the car goodbye 69 Camaro.
I now have another portable shelter for my Barracuda learned from past failure and put a floor down inside still not perfect but it was good enough to get my current car running and on the road portable heaters made it possible to work in there during the winter.
I`m sort of in the same boat as far as motivation right now I want to work on my car, i`m so close to getting paint on it,but since work is scarce for me right now.I have to keep an eye on my finances first and keep the roof over my head.