I used discarded mountain bike rims, and old sturmey hub, and bought spokes from my lbs, they measured my hub and rim and cut some spokes for it. I bought a park truing stand, dish tool, tesion guage and a wheel building book. This was my first schooled attempt at wheel building and it came out perfect.
I did this once before, I laced a sturmey hub into a 27" schwinn front wheel that had the same sized hub as the sturmey, I knew nothing of crossing spokes and wheel dish, it came out awful, but it's all a part of the learning curve.
My Schwinn Speedster, 3 speed coaster riding on moby bites with a big shifter.