That's cool. They charge a lot round here to do it for you and they don't even take the pic. It must be time consuming to stretch a canvas, how long does it take? I can't imagine It takes more than an hour and if your working for someone else I expect they would like a hundred an hour.
It is possible to hire printers at less than couple of hundred a week, the ink is like a hundred or so, the canvas is the biggest drawback since it comes in rolls of 25 metres or so; but if you wanted FOUR canvases of A2 size, if it wasn't for the fact that you had to buy 25m then it would be about the same price as having them done professionally.
Cor, amazing.