Yeah that absolutely would have played a big factor, but stress increases stroke risk as well, so it’s likely a combination of issues. I don’t think it should come as a surprise that this happened to him right after he lost his decade-long battle to avoid extradition to the US.
I’m no expert but just helping you kick the tires a little bit - for the audio outs, are you thinking of just running speaker wire from an amp in the server closet to the ceiling of all of the audio out locations?
For what it’s worth, I’ve dabbled with wifi/Bluetooth speakers and while they generally work well, there always seems to be some software update or connectivity dropouts enough that I’d much prefer a wired system to eliminate over-the-air issues for a long-term robust solution.