Hi,

I asked the same question a few weeks ago and several people adviced me to buy my own printer.

The discussion is here http://www.qatarliving.com/node/6144496

I have checked the prices in more than one place, and for printing, they usually charge 1QR per page. I went to rawnaq near the airport too, it is 1QR 17 pages but for photocopy and not for printing.

For printing (from a usb or else...), they also charge 1QR per page.

It is pretty expensive compared to my origin country but...