If you are using regular potting soil, and not a cactus mix, or African Violet mix, I wouldn't worry too much about the soil ph. Easier to adjust water, and check run-off. If broke, I'd at least get a freshwater aquarium ph test kit for $6.oo or so) Problem with those are that you can;t get an accurate reading on your run-off water. Since the run-off water isn't clear, it affects the color-coded results.
One of the best gadget purchases a gardener can get is a ph pen. Mine is a $60.00 Milwaukee that's worked great for almost a year. I consider it indispensable. :thumbsup:

You can google ph up, and ph down for stuff to adjust water.