If it's 6 month holiday visa you could support her on your money,she will have to prove that she will teturn after visa,get in touch with Ploy Regal Swan she will help you and she is english speaking,it's easy if you get the paperwork right
Get in touch with Ploy Regal Swan she is good,we had no trouble getting a visa for my wife's son,makes a lot of difference if your wife has uk passport as well,good luck