why you did not apply her beforehand a family visit visa rather than a business visa? before you can apply her a family visit visa, she needs to exit qatar then come back with the family visit visa. with regards to how many days before she can come back, that will depends on how long you will apply the family visit visa because normally, processing of visit visa takes only 2-5 days, that is based from my experience. for family visit visa you should at least 5k basic salary while for family residence visa, you should have at least 10k. other requirements are copy for both of you, passport, marriage certificate, your copy of qid.