It is not difficult as per visit visa she has up to 6 months so once she comes here and before one month finishes take her to medical with her original passport her visa copy and ure credit card as the fees is 100 qr then wait the result. u can extend her visa by paying 200 qr every month or every two months or 5 months at one time , for that purpose u should take her original passport and visa copy and ofcourse credit card or whatever bank card u have. Also to get the 7th month u should get her air ticket for the date she should leave qatar and a demand of extension, original passport and bank card. hope this helps u out.