That is an excellent comparison. And with the assumption that geothermal wells can last longer (the wells for my geothermal HVAC system were rated 50+ years, al

That is an excellent comparison. And with the assumption that geothermal wells can last longer (the wells for my geothermal HVAC system were rated 50+ years, although I presume my wells and the types of wells needed for a 400MW plant are far different) then this is actually pretty decent.