Hybrid Off Grid Energy Feasibility

Hi folks, new to the forum. I'm in the process of purchasing a remote 5 acre plot of land in the north east of Scotland, the cost of getting electricity to the plot is at least £30k so before i commit to that I want to find out whether a hybrid off grid system of solar and a wind turbine with a backup battery bank is actually practical and would actually service the energy demand of the house power & heat. We are planning to build a relatively modest 3 bedroom 110sqm

We went on hols for a week and I monitored the energy use in our absence. Our house is all electric. Passive class, no heat pumps or woodburner. I turned off everything except the following. MVHR ,Fridge/Freezer ,Biocycle septic tank. Total 3.68 kWh/day. (153 watts) Heat Loss from the immersion powered 300l UVC @70deg. 1.64 kWh/day (68 watts equivalent load) Total background load 221 Watts or 5.3kWh/day of which 30% is heat loss from the cylinder. Granted ev