Don't Ph.Ds take minimum about 5 or so years though? So even once you start and finish a Masters, won't you probably have about 3 years to go to finish the Ph.D?
My Psy.D is going to take about 4 or so years from the time the Master's was finished, and I think a Ph.D takes slightly longer.
You should look into a Psy.D though if that's the case. Slightly shorter, still a doctorate, and it's geared toward more practical uses than research and whatnot.
Good luck, nan! I vote you start.