@ Speedhild ~
When you received your offer letter, did they send with it a JOINING PROECDURE FAQ ? Most of the immigration/visas are in there. I had a look for you regarding the wife issue, here is what I found :
If your spouse and children are eligible for visa on arrival, then they may travel to Qatar at any time that you have accommodation for them. This will be dependent upon your housing entitlement.
If they will be able to join you on your initial flight to Qatar, your coordinator will assist you in arranging their Joining Tickets. If they will be joining you at a later date, you will be able to arrange their joining tickets at the QR Staff Travel Villa.
Does your joining coordinator answers your e-mail from time to time ?
Regards.