I am as green as they come but more than willing to put in the effort to learn.

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I would advise talking to a lender and finding the best product for your situation.

Even though a majority of the custom homes I did wanted tankless because they were cool and green....Most tanks last far longer than the expected 10 years and the new ones are very efficient.....Did a search ...https://www.consumerreports.or...Main takeaways are: 1) they are very close to the same cost to operate per year 2) the payback time on the tankless is about 25 years.....Plus tanked heaters are a good source of water storage in the event of an event like earthquake or such.....

Smoking also includes the use of an electronic smoking device which creates an aerosol or vapor, in any manner or in any form. [2] “Electronic Smoking Device” means any product containing or delivering nicotine or any other substance intended for human consumption that can be used by a person in any manner for the purpose of inhaling vapor or aerosol from the product.

Some providers take the approach that a furnace or water heater with several years of expected life shouldn't be replaced in the rehab, but that the final product should be priced accordingly.

I've recently finished reading Brandon Turner's "The Book on Rental Property Investing" and am about 50% through David Greene's "BRRRR." 

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I would first watch some YouTube tutorials on the product and connect with other investors who use the service readily.

A light sage green or navy blue will do.