Alternatively I remember when I was a kid my grandparents would spend several weeks in a holiday let that had a coin operated meter for the electric, we had to keep feeding it coins to keep getting power, surely they could do the same thing these days.

They had some in Tesco as recently as a couple of months ago, was brilliant.

It's paid (one off $15 I think), but has a two week trial but I've been using Nine for a few years now, pretty happy with it.