Some of my work is in cellular connected devices. MTM (machine to machine) so the only pushback I get is cost. Both the initial cost and the monthly cellular fees.

Here's the usual GSM Cellular power switch: https://www.amazon.com/Switchbox-Remote-Control-Via-Card/dp/B00IU1D1AC

The problem is what GSM SIM to get. I just tested an UNREAL SIM and that's not going to work. I can write that the Ting.com or Tmobile SIMs seem fine. So with Ting.com you might be looking at 10 bucks or so a month to run this box.