Question about Sonos One SL Bundle

This will probably not work. Usually, you even need a LAN cable from the router to the Sonos box to set up the first Sonos component. After that, all Sonos boxes can be integrated into the system via W-LAN. (I think you can remove the LAN cable again??!) So that all the boxes don't put too much strain on the W-LAN, there is also the Sonos Bridge, which provides a separate W-LAN channel for all the boxes. But it also has to be connected via LAN cable.
The boxes can also be addressed via Air Play. This only works if all the devices are on the same Wi-Fi network.

Even if it were to work with a hotspot, it would probably be tedious and not user-friendly to always connect everything together. That would be a stopgap solution, if at all. With a home wifi, everything is always ready for use.

I was only talking about music playback now. Don't get me started on the connection to the AppleTV....