In the last 25 years I've had dozens of projects ranging from pickup trucks to sports cars, but they've always run kind of similar well worn path through my life.
The 12 steps of MY project car cycle (Your cycle may be different, this is mine):
1: Impulse buy a random project that's interesting for one reason or another. (Looks cool, "always thought those were cool" etc... but mostly low entry price combined with varying amounts of one or more of the others)
2: Research enough to realize the impulse buy may have been stupid. Consider options.
3: Damn the torpedoes, full steam ahead, The last project's already on it's way out, so even if this one's a bad idea, let's get into it anyways.
4: Drivetrain. I don't need more yard art, so the sucker's gotta run and drive under it's own power sooner rather than later. Besides, I'm already working on all the little fiddly stuff on the project that I'm about to sell, so doing the drivetrain stuff is more rewarding.
5: Getting secondary systems like suspension, brakes, etc. *sorted* (bodged, cobbled, duct taped, zip tied)
6: Possibly something cosmetic, but usually not much, not because it doesn't need it, but because to have real car guy cred, you just lacquer over the rust and act like people who don't get it are snobs.
7: Rolling debugging... hopefully not literally, but that happens too. Basically, drive for a while fixing the things that were bodged, cobbled etc. in earlier steps, but never fixing more things than the number of new things that've gone wrong... This process is ongoing and continues until step 11
8: Repeat steps 1-2 with new project.
9: Decide to sell to fund and make room for new project.
10: Fix all the stuff that should have been done before step 8 but didn't get done because doing the fiddly bits to sell the last project kinda burned me out from doing little fiddly bits.
11: Immediately regret having waited.
12: Sell car for too little after putting in too much work (and money), but by now we're past step 4 on the new project, so the old one's gotta go to make room.
There have been times when there have been 5 or 6 cars in that cycle at a time, and 3 or 4 has been pretty standard...
What does your project car cycle look like?
If you've broken the cycle, how did you do it?