When we built new in 2001, I looked at all the available technologies for residential heat/cool and settled on a ground source heat pump. Four 200 foot wells under the driveway kick out cheap heat and AC.
300 + percent efficiency is tough to beat. Payback was less than 5 years vs. traditional all electric.
Wish we would have thought of it several years ago, but now I’m not so sure we will live here long enough to make it worth the cost. Aren’t those pumps really expensive?