You could just make actual contact sheets on 8x10 silver gelatin paper. A box of 8x10x100 Arista.EDU can be had for less than $100. A gallon of Dektol and Kodak fixer will process a lot of paper. From there, you just need a safe light, a sheet of glass, a couple trays, a room that you can make reasonably dark after the sun goes down, and a halogen work light that you can point up at the ceiling and turn on and off easily. If you want to, you can hook it up to a cheap eBay enlarger timer. From there, just work out a rough exposure time and blast through it. You'd be amazed how much you can get through in a couple evenings. Then if you really want it digital, just scan the paper in as a reflective photo that the scanner can handle just fine.