In that case you are well above double the national average of electric consumption which I’m sure you realise already!I do have Tesla but almost exclusively charge on public chargers as they are currently still free in my Local authority! (ridiculous situation i know but taking advantage still)
The size of the property doesn’t really impact it like heating, over a certain point of base consumption (fridges etc) and standing charges, it’s more just about the personal consumption of the people in it.
For context we are also in a 4 bed detached and 2 of us work from home most days, and charge the EV at home and we are over 1000kwh lower in consumption per year.
There are only the two of us though and we have always been very good at switching stuff off which is what keeps it in the normal range despite having quite a few luxuries like a second fridge freezer, boiling water tap, 24/7 NAS computer etc.
The way we see it is why spiff money up the way on electric (even when it’s cheap)? I could spend it on toys or holidays instead.