I built a golf simulator system myself and through multiple purchases found high quality items to create an affordable COMPLETE golf simulator.
I have been selling golf simulator systems on ebay.com user markh7257. I have a 100% positive feedback since 2005. I have also sold on amazon.com under Golf Simulators.
See attached Optishot vs P3ProSwing Review:
https://www.youtube.com/watch?v=uwMfl0wcZWo&spfreload=10