If wireless reaches the spot, maybe upping your cell service to act as a data hotspot would fit the bill.
The key issues are whether there’s a high enough data rate available at the location and whether your vendor allows you to switch on and off any extra data needed.
Yeah, but—$$$$ !
Thanks for giving me the terms I need when I go asking! But it can’t be reliant on any one person’s cell service. It has to be connected to the house because we can’t be sure who will be using the house.