I would agree with John T. - Pickups should work basically forever, but the wiring/volume potentiometers will fail.
not to hijack your post, but I'm going to hijack your post! I used to teach CAD (computer aided drafting) at a vo-tech, and I was into big projects - one of which was building guitars. Design them, then build them, see what your drawings are really used for, that was the idea. We had a GREAT time, and my students really LEARNED something, even when they didn't realize they were learning.
Unfortunately, due to budget cuts, my program was axed. Good old New York State.