If you live in a place that is off the beaten track, I would think that reliability and some way to get service and parts is more important than any other properties, as either Epson or Canon can make excellent images. I think this is more important, say than the price of consumables.
+1 to that. While there is a wealth of information in this thread, I think you are asking the wrong questions. What matters most in a print business is that your machines are reliable, serviceable and that you can get parts and consumables quickly and easily. Servicing printers takes money and time away from running your business, and downtime is costly. Quality is pretty similar on modern printers, but if you can get parts and consumables (ink, paper, maybe heads) more easily from one company, I would go that route.
You also need to look into the total cost of running the printer. Will your current computer work or will you need a dedicated system? Can the printer build adequate profiles for your desired/required media or will you need to buy a separate profiler? Can the printer software handle multiple print jobs or will you need to buy a RIP? If a printer is purchased through a vendor like B&H and shipped to you, would that void the warranty? How much will consumables cost when they arrive on your doorstep?