Thanks for the advice on the Takagi, Jr., I will certainly look into it. Is there anything else that you’ve done to get past the cutoff issue, like a small reserve tank ahead of the unit? Why does this model not have the issue that most of the others appear to have?
Regarding the generator, I’d love a quiet one. That old Onan’s a beast. But, it does work and it works well. Replacement is another big chunk of change. It’s been rebuilt so should be good for a while yet.
Not sure about the cutoff issue. All tankless on demand units require minimum flow rate to kick on - that’s the down side. You could put a small well insulated tank down stream of it, closer to your water faucets to get hw quicker and in small amounts.
A honda variable speed -2kw generator would run ~ $1200 jumping up from there you are looking at close to twice the price