Soldato
With 3xfridges and 3xfreezers, that prob going to be 10+kWh straight away just on normal settings/temps. What's your heating source/setup in the whole house? Definitely no immersion heaters on for any water tanks, as they guzzle electricity. Time to get a few Tapo P110 or alternative elec monitoring plugs and test on various appliances for a day at a time and get some more in detail readings.
That many? Sheesh, yes. That can take a lot of power.
In all honesty, people need to reconsider whether keeping food in freezers is economic. They cost a fair bit to run and often they aren't storing anything worthwhile. Better to let the supermarket pay the bill for their fridges and freezers and just buy what you want when you need it.