if you want to bring your wife on a husband sponsor the minimum salary requirement is QR10,000. they will require u to submit 3 month bank statements showing that you have qr10,000 salary/month. if your salary is less than qr10,000 u can still bring your wife and kid here on a family visit visa.

the difference of the two; husband sponsor is a resident visa while the family visit visa is a temporary visa w/c is renewable up to six month..after 6 months, your wife and kid have to leave the country and after 3 months you can re-apply again..