I've done it for a week or two at a time. I used to travel to my late parents' house to keep an eye on it, the phone and internet were disconnected but I needed to work and I RDP most of the time.

Even in the sticks, I got it working well after checking which operator had good signal. Initially I went with EE's little MiFi thing, then traded up to a better model.

I tried with 3 and EE which were the only two with coverage and it worked well... I could work freely, watch Netflix, etc. Mot the cheapest option but it worked. With more time to invest in an external antenna I reckon it would be even better.