While you can't change the existing storage you can augment it - jack a decent size (64 is specified by Lenovo but I've seen, on a Lenovo forum support thread that 128 works), qualitay SD card (id est don't cheap out here, you're already on a hiding to nothing as it is) in there, and then get...
Plug your service tag nr in at PARTSpeople and see if anything crops up there. Also, besides SPL (and as much as I am loath to mention them), there is also PartServe as for a last-ditch attempt. Also, does yours in fact support M.2 anyway?
Well HD Cabling have the MeCool KM9 Pro for less than your per-device budget so there's that (not affiliated with them, have bought only once from them so far), and I (or, to be honest, several others here) could source the Xiaomi Mi Box S for a little less than that too (seems there's that...
Sure, knock yourself out (the equipment will be fine).
Longer answer: assuming (and no reason not to) standard, and more than likely 802.3af switches and phones, power gets activated only after a successful handshake between a source device (the switch), and a client - in this case a phone. The...
https://mybroadband.co.za/news/technology/346591-a-south-african-companys-world-class-tech-is-helping-google-and-amazon-build-drones.html
SONAR uses sound, in water while RADAR uses radio waves, typically in air/space; 'sound' there is utterly incorrect.
LIDAR - LIght Detection And Ranging
RADAR - Radio Detection And Ranging
SONAR - SOund NAvigation Ranging
...you may want to brush up on your acronyms. Oh, and fix the article while you're at it.