They do have better accommodation for Qatar Amiri and usually a villa. They have a compound somewhere around Doha but I think it's full so they might have got some new places.
Not sure about staff travel now when it's separated from QR.
Basic pay is some $2200 with other allowances on top of that. Anything between $50 and $150. I can't really remember so the figures might be a bit wrong. There's also a monthly transport allowance because you need to get yourself to and from the airport. Some buy their own car, some use taxi.
It's also top secret so not allowed to say where you are going. You'll get a text message which says if you're going somewhere hot or cold so you can pack after that.
Also, you have to sign a one year bond if they haven't removed that bit.