If my plans are complete with all the templates, I just trace onto tracing paper. Then it gets stuck to the wood using a spray adhesive. I used to use 3M77 but I found a cheaper one at Home Depot and Lowes, just cant remember right at the moment. It just takes a light dusting of the spray adhesive to stick the template onto the wood. Cutting it out on a jig saw is easy. Just dont rush it and bend the blade. I've stuck as many as 3 layers of wood together and cut them out which helps when doing wing ribs. You can reuse the template or make another new one. Just takes a steady hand. Most of the time I cut to within 1/8" of the line then finish sand with a 1" verticle belt sander. The parts are pretty accurate at that point. You have to take the template off the wood right after its cut out or its hard to peal off later. Then just throw it away. I usually spend about two evenings tracing then two to four evenings cutting. My last wood purchase was around $400. I'm still working off it and have built 4 planes in the 80" ws range. Occasionally I have to order a little here and there to restock but its not a lot. You can make your own sticks out of sheet stock.
Edwin