The house will be used year-round, but mostly only 2-3 nights per week.
We are trying to tie in with geo desuperheater, which shd provide at least warmed water ahead of it (depending on the season) -- otherwise, incoming temp in the middle of January measured 54º.
With 3+ bathrooms and hi flow (unrestricted) showerheads, first hour use can be high, esp with guests -- but mostly, it will be two or three of us.
So I am trying to find a happy medium between periods of no use, periods of very high use, and periods of moderate use. Thus, a small-tank HE.
I know they're pricey, but it seems this is the best time to take the plunge, while we're building.
I appreciate feedback--thank you all! Mark