Need a reputable but affordable Travel and Tourism school online

I am presently taking my Associates degree courses for Hospitality Management, but I also would like to go on ahead and take Travel and Tourism courses so I can be finished by late winter or early spring. I have been researching a few of them, but am close to deciding. I have three in mind but only one can be my lucky choice. The schools are Stratford, one is Trave-L-World, and the other one is a Distance Learning from Harcourt which I already am registered to for my Associates degree. The only problem with that is that they want me to pay my whole balance so I can register for their Travel and Tourism courses. I don't work and my dear hubby is paying monthly for my Associates. I would rather pay monthly for the main reason of it being much easier on the pocket than plopping the lump sum. If anyone there knows any other schools online that do monthly payments for this, I'd appreciate any input.