How often do you print? And whats the prices? If you print a lot and do it frequently, it would be cheaper to buy a printer as you save time going to the shop and can use that time to earn money elsewhere, but you will also pay less for your printing needs. Calculate your spendings at the shop in one year and see how much it adds up to. See if you can find a printer at less than that and can buy enough ink for it to last you the year at less than the amount you spend at the shop. It'll probably be cheaper to buy a printer if you print a lot.