Chicken or the Egg -- Jointing Wood

I'm stuck in a bizarre loop of a problem. I'm building a woodworker's workbench. This is my second major project in woodworking, and I've run into a snag.

I own a good jointer plane (Veritas) and a decent portable table saw. I can't afford $600 - $1000 dollars for a power jointer, and I have no issue with good hard work. To straighten up my stock, I figured I'd use the jointer plane. Problem is-- without the workbench I don't have a way to secure the work for planing. Without truing up the stock, I can't build the workbench. See the problem?

I'm still amassing a woodworking arsenal, and basic shop input would be nice, too, if anyone wants to chime in-- Keep in mind, I'm working in a garage, and space is limited--

I have a Bosch portable table saw, which works quite well, a router table (both purchased for wainscoting in the dining room), a sliding Dewalt miter saw, I just bought a drill press for the workbench project (for mortices and dogs), assorted hand power tools (circular, jig, reciprocating saws, drills, biscuit jointer, etc) hand tools (chisels, lie-neilsen back saw and smoothing plane, waterstones and a honing guide for my planes -- of which I own a cheap jack plane, Veritas jointer plane, shoulder plane, and a Lie-Neilsen smoothing plane on back-order. I have a Ridgid drill press on the way.

Advice on how to joint the wood in my current situation-- need a Jawhorse type thing? Or should I put up $250 for a cheap Delta planer?

How would you proceed?