I've been running Kodi for over a decade now. It starts on boot, so all I have to do is start the desktop. Remote works with an open source Anroid app, it also allows streaming from Kodi to your phone and vice versa. Youtube works fine, never tried Disney+/Netflix, I'm not sure that's possible.
A while back a similar project launched, one of their competitors mentioned there is virtually no one willing to pay for this. So I wonder if you thought about this, it might require some solid marketing to keep alive. Good luck to you!