@John S.If your replacing a gas unit with tankless, it may not be too much trouble.

Although they say they are paying gas and electric.

The gas is separate and the electric is combined, but I do split the electric bill between tenants.

That being said, if you have 20 properties you want to see it might be nice to send them a gas card (broker permitting) in addition to their commission.

Sellers removed UST (cost was $20k for them), already 3 gas meters and installing two other boilers to separate heat.

One time I had 4 different contractors (roof, drywall, trees, and gas) all at once with more than a dozen work trucks and cranes.

That said, I don't want to take my foot off the gas with investing either. 

The home has gas utilities but I plan to replace gas fixtures with electric. 

I replaced a few gas furnaces over the last few years for about $3,000 with Goodman. 

Kinda like shopping for a car: when you really think about what you want or need, you may decide good gas mileage, large enough for your family, good power, and other specific qualities or features.