May want to consider doing a bit of a hybrid mix for heating & hot water….
I live in a old big property (6x bathrooms & 5x bedrooms), we had ‘Stiebel Eltron’ hybrid electric infrared + convector heaters for all bedrooms, kitchen etc. fitted with individual timers on each 11years ago, plus a 2x 3kw element immersion power flow hot water cylinder, 2x coal/wood burning stoves and 1x has part radiators with a hw heat-exchanger fitted, plus 2kw solar panel array fitted. In the depths of winter would cost around £150 -£200 max per month to heat (coal,wood,elect). In summer entire house electric including lights, cookers, immersion, TVs, kids, computers etc. £65 ish per month… we also just had an oil boiler fitted for convenience to complement all of the above….
No mains gas in village.