* Best contact the estate agents listed here http://www.qatarliving.com/node/1593
* Depends, if it's a flat 10000 out of which you will have to pay for evething, ie food, accommodation, transportation then forget it. Unless you really want to live on the periphery of society.
* What do you mean by how is it to work for QA? I know cabin crew bitch about work a lot and pilots are always looking over their shoulder.
Check these posts for QA info:
http://www.qatarliving.com/node/891
http://www.qatarliving.com/qatar-forum/forums/american-going-to-work-for...

Good luck.