You mentioned you have an Asus router. Which one? Why not move to hosting your stuff on the router? www.snbforums.com/forums/asuswrt-merlin.42/ Sure it doesn’t completely solve the issue but in my experience it’s incredibly stable, and more so people expect to restart the router if the Internet isn’t working which simplifies things too. Also beneficial is that you can give different clients different DNS servers comfortably.