If it helps, I’ve done 4100 miles in the last 8 months, none of it trying to drive for best economy!. Only charging at home my largest monthly cost so far has been £15, it’s usually around £12 to £14. And those costs include using the washer, tumble dryer and dishwasher.
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!