Hi, is the cost of operation an issue?

So let's rule out electric tankless from the beginning. It doesn't achieve anything that you want, and adds a lot of cost to the electrical side of things. Your generator would not be able to provide power for electric tankless .

Options are:

-Standard Electric Resistance Tank
-Hybrid Electric Tank (very low operating costs, but needs air from garage, basement, etc from which to pull heat).

-Standard propane tank
-Propane Tankless (less operating costs than above) A 200k BTU unit at those water temps will provide all the water you need.
-Hybrid tankless w/tank (low operating costs compared to standard propane tank, but high volume)

I would go with Electric hybrid and avoid propane. Propane has had some crazy cost volatility.

Something to consider on your new build is grid tie Solar PV (electric) with battery backup. This might be in the ballpark cost wise if you were otherwise considering a generator and propane install.

Grid-tie solar would provide some percentage of your electric power that your home needs and feeding any excess back into the power company. The battery backup would provide you with emergency power.

You are in a good part of the country for Solar and since it's a new build, you can do it right