I'm looking to automate the startup and shutdown process of a small museum I work for. Right now staff go around at the end of the day and switch off power strips or unplug things from the wall one by one, which is tedious.

We recently received a little money (~$500) to do the update, and I'm looking at a simple Home Assistant Install on a Pi and a bunch of SONOFF S31 ZIGBEE plugs.

All I want is an easily-accessible "Power on" and a "shut down" button, either on a tablet, keyboard, or physically. The museum is booked by groups, so there aren't regular hours to schedule. There are about 25 powered exhibits on the floor right now, a few of which use PCs and so need soft-shutdown and won't be part of the new system.

Just wanted to check to make sure this sounded like a good idea, or if there was a better (more simple, reliable, affordable) approach.