Funnily enough I am speccing into Int but not taking the points for a workbench. I'm focusing on trading, and it's kinda crazy what you can unlock early with it. I'm in the pine forest playing slowly and got a steel club on day 5 or 6, a bunch of good books, and some military armor which is surprisingly cheap. To give you an idea of where I was at, I didn't even have all body parts armored yet and was using a wooden club. The trader is selling a fully assembled minibike as well, which I'm saving up for. What he hasn't sold me is the stupid workbench but I won't need it until I'm ready to make bullets anyway, which will probably be after the second blood moon horde.
I'm not clear on how loot stage affects finding a workbench schematic and if it's even possible to find it in the first few days - in the pine forest anyway. I would definitely have it faster if I just spent the points, but I'm not taking Grease Monkey either so I'd have nothing to build anyway.