Nice. I just looked up last February's bill for my ~1700sqft detached SFH in Saint Paul. It was apparently 6.8 therms/day (12 deg F average temp for the month). That maths out to about 5916 kWh for the coldest month (6.8 therms * 29 kwh/therm * 30 days), or a little more than double your estimate. March was 5.9 therms/day and Jan was 5.4 therms/day. So I think your costs are on the conservative side of things... or possibly my home is very inefficient :)
E: Ah, it occurs to me that you're using electric heat pumps, which are probably much more efficient than my NG boiler.
Yes, I pulled the estimate for really efficient heat pumps. To convert to all electric heat like that estimate, we'd have to replace a lot of gas heat with electric. Might as well go for the most efficient thing.
Compared to the nearly $200B in infra investment that I was estimating, that looks easy, lol.
I realize this isn't relevant for a discussion about future investment, but the current "value" of the whole energy infrastructure for a state is probably in the hundreds of billions of dollars, right? It's been built out over decades, of course, so the actual costs per year are much lower.
That's definitely possible. Going based upon the output of something like Catawba, that looks like ~3 nuclear plants. I bet that could be done for less than 100B, though I'd just be guessing. I also don't know anything about operations costs for that.
Also, I estimated solar at $1.5/watt. That's probably at least 50% too high.
E: Ah, it occurs to me that you're using electric heat pumps, which are probably much more efficient than my NG boiler.