what package is offered to your hubby. If he is coming on family package, his company will either provide him accomodation or pay him whole or part of the rent.
Al Khor is not a bad place to live. It has all the modren amenities. As for safety, whole of Qatar is very safe.
Expect to pay between 4-7000 QR/month for a decent studio( hard to find... almost all Al Khor is villas)