..have a good rummage through this site and previous discussions on this topic. I too asked the same questions and more, and I invariably found that taking in the wealth of info here in almost its entirety was a better answer than any one response.

Also, for answers to the housing question, have a look at www.remax-qatar.com and www.mirageproperty.com. I've used Remax myself and found them at least knowledgeable and friendly.

Good luck!