yes there are two types of visas family and visit visa
family visa may have minimum salary req. but visit visa dont have a strict salary limit later on you cannot sponsor your spouse if he is coming to Qatar on visit visa sent by you.
If you want your husband to live here permanently on your sponsorship you must send him family visa and complete the formlities required.
and visit visa cannot be converted into sponsorship spouse/family member must go back within the period of visit visa.