Dont know were im going in the hobbie anymore:

Sell all your stuff and by a nice 60's-70's muscle car you can drive and enjoy...

This^^^^!! Except I may change it up a little!! I would keep the best project car you have, the most solid body with the best pedigree!! Then sell all the other stuff with the goal in mind that you want one good car out of the lot, and make it your ideal car!! I'm currently shopping my best car around for a trade for my ideal car...a 1970 Roadrunner! I want it apples to apples in value and condition, even if I have to do things to it, I want it to run and drive!!

And that right there is the key!! You must come away with something nice that runs and drives!! Changing little things, and upgrades here and there, is a lot more enjoyable when you can jump back in it and beat on it when you're done!! Then you can take your time on your project car!!