Looking to open doors with 2 buttons for under $100

Charles Shattuck has been helping me develop an affordable, programmable, wireless, two button switch system.  Once refined, this device can help people with limited mobility, navigate social media, play music, take pics/vid, and have a voice for under $100.  Thanks Chas for the help.
https://goo.gl/photos/AmW72fhEkrd7urzN7