geothermal heating here is about 30K for a household. we have an air/water heat exchange system which is about 70% of that price, but still needs enough electricity to make price increases painful.

Would love a solar roof array, at least for 8 months of the year, but it is well out of our price range currently. We have to replace the roof and if we could go full solar, we would - but costs...

There are also new options for "mini nuclear" reactors, that produce far less but are fast and much cheaper to build. Having them spread around might be a better option.