I only decided to set up a personal AWS for some minor things after having worked on it at employers for many years, after watching employers accidentally spend $3000 a day or $1 million a month or $35,000 in error. Cloud is the devil, bring back servers. One flat piece of hardware you can do whatever with...but even that's not sacred. If you use hosted servers, the hosts often still charge for ingress/egress and other things now, so you still fall into traps if not careful. Simpler though.
So I guess, storing your own server in your office is the way to go, but then the ISP issues...
Let us all just go back to paper, actually.
There are cheap Chinese ODMs that make trackers for companies. Used to be a "cube" branded tracker that was for keys, not sure there still is. Never used the app, just used LightBlue explorer (free app) to scan for BLE devices and noted its MAC address. The app shows signal strength.
If you have to find your thing, you just point your phone around and watch the signal until it gets stronger. Same process the fancy apps use without the creeper crap. This app also let's you find any of your devices broadcasting a beacon. Fitbit, watch, whatever.