100$ Should include also all the required hardware. I do not blame you for trying to take adavantage of noobs, but this price il pretty crazy for a couple of lines of code..
this uwp app is not done in couple of lines or classes or in couple of days.im selling this kind of game
https://www.youtube.com/watch?v=N49fedAGppo for 60$ at here which is for programmers .
https://www.assetstore.unity3d.com/en/#!/content/76153. there the targeted sales counts is different and support time is also low,here for this app, purchase count will be low,support time will be high.
I initially developed this with all hard coded values only for my use,after it saved me a lot of my sleep time,worries of getting hang ,i decided this for public release,$100 app to control virtual unlimited number of rigs is
the best solution.And the hardware like pi3 ,relay modules will available all the time.