With practice you could use a changing bag for processing 8x10s in tubes. This is what I do so that there is no need for a dedicated darkroom and I can work with all the lights on. In addition I only work with contact prints. A spare room with running water and a hook to hang the bulb is all that is necessary (and some trays of course). There are some fantastic deals on process lenses these days, some of which have coverage that is unbelievable. Film holders will be about 30 to 35 bucks in mint condition each.