If you don't plan on using an M.A. in photography in order to make money, then I would suggest that you apprentice with somebody whose work you admire. I think that you would learn more this way and have more fun.

There have to be some photographers that you admire in Arizona, landscape capitol of the known universe. You probably would get assistance that would be more direct and personal than you would in a university, and you wouldn't have the hassles of grades or exams.

If you want another degree, get it in something that you will use to make money. That way you'll have more money for your photography.