IoT experimentation, midi pipe organ pedals and remote controlled passive XLR summer

I see your point! Going instant into a place, (additional) cables are not an option... so you need reliable communication. Setting up your own access point(s) and networks is the way to go. Did you ever think of directed micro-waves? So you could place the access points even away and have robust / solid connectivity... Yo can go directed because things do not move anymore after setup. I'm thinking about little - micro - mirrors / yagis... ;-)

Thanks for the pic... it just passes on a lot of context.