Bottom line: The combination you want cannot be done. You will have to pay lots of money and be tech savvy. Walmart can sell you a Hotspot IF you have landline phone service. You can hotspot a phone but it won’t be cheap.
You can use a tablet with 4G and hook it to a TV but you need to be fairly tech savvy and it also isn’t cheap.
You are better off buying an expensive package and hooking it up full time if you really want TV and internet. If it were me, I would do ...nothing and just enjoy the home. If someone wants to bring a PC/tablet with a hotspot, that’s fine.
Appy, it’s not me. I agree, just enjoy the scenery and go off grid (there is a land line anyway). But “the boss” insists there be decent tv and wifi up there and I want to find a way to do it without forcing the home in the city to use a really crappy service which is what is going on now. Costs being the operative factor for the boss, faster internet and our well loved dish hoppers and joeys for us.