It comes in a spray bottle and is designed to stop/prevent/kill mold and mildew

I have reached out to Aloha Capital and Merchants Mortgage, both local, and confirmed they offer DSCR-based 30 yr fixed loans on single properties, but maybe that is a different type of product than the Portfolio loans you've mentioned?

You all confirmed what I had in mind.

Confirm that the provider has a pristine reputation (e.g.

After I posted this I spoke with two real estate attorneys AND my accountant who confirmed what the two of you said and added some points: The  LLC adds a layer of protection, one attorney did bring up that an LLC does not protect the landlord against liability for lead paint (the vast majority of homes here are pre-1978).

The program was designed to promote energy conservation verses economic development (such as Opportunity Zones or TIF's).   

I met them online and we are not in the same market so I am unsure of how to about vetting this person and confirming they are as knowledgeable as they say they are. 

Start making calls to confirm the numbers?

Although, in some cases, based on employment and such, they will ask the potential borrower to provide the past two years NOA (notice of assessment) to confirm that no taxes is owed and to confirm tax returns.

@Andrew Wiseman  Have you first confirmed he owns the properties free and clear?