For a cheap thrust stand you can use a bathroom scale (mechanical) and cheap Keychain video camera to record and playback the readings.
and a cheap keyc
I would suggest a camcorder that can record at 60 FPS. Perform the static test with the nozzle pointed up and sitting on the scale. A mechanical scale is actually a little better than a digital scale if you know it is calibrated correctly. Record the burn at 60 FPS so that you can see both the scale and the motor burn. When you ignite the motor it is going to push down on the scale and show weight. Play back the video frame by frame and record the scale setting at each frame. If the motor burns for 2 seconds you should hypothetically have 120 data points. These can be plotted on a curve. Measure from the instant the motor starts burning to the instant it stops. From this you should be able to calculate average N/S, total NS (avg. NS x thrust duration), peak thrust, and initial thrust.
If you do not think your motor is going to generate more than about 10 psi, then use a kitchen scale which is more accurate but cannot measure as high of weight. I have one that goes up to 11 pounds (5 kg).
This is old school, but it works amazingly well.