If you didn't mind saving up your film and running it in batches, you might actually be able to sustain your own mini-lab. I used to work in one, the equipment isn't really all that unreliable that you'd have to spend a lot for parts. You would spend a lot in chemicals, so you'd have to run large enough batches to make it worth the cost of buying new chemicals for each batch and the costs and time of running a fresh start up for every batch. If you didn't mind some quality drift, you could probably run chemicals longer than they were intended and dispense with the entire startup/calibration process to save money. I actually thought long and hard about setting up my own mini-lab, but ultimately came to my senses! Still, if you shoot a lot of color, it could work.