Hey mate, no need to worry she can come here on a visit visa, But if she gets a job here, then it wont be a problem, or on the other hand if you guys get married and if you are talking about family visa, well then the rule is that if you earn 5000+ Riyals/month, then you are eligible of getting a family visa. for more details or other info about visas check out www.moi.gov.qa, i think that site has more details, thou i didnt check it personally. But hope it helps you out. Good luck mate, wish u both a happy future togather :).