The violation or enforcement of those portions of any law or government regulation concerning:a. building;b. zoning;c. land use;d. improvements on the land;e. land division; orf. environmental protectionNow I haven't seen or read the OP's so I don't know if it's an HO's policy or if there is an exception to coverage which might affect the underwriter's liability if it's otherwise provided. 

Sorry for such a generic laundry list of questions but feel free to leave a stream of consciousness and I will appreciate any advice. 

If you choose postcard mailout be conscious that there are other players in the market doing the same.

@Sue HoughI actually was an environmental engineer looking to get in to the solar industry a few years ago.I absolutely LOVEEEEE the solar tiles.

Cash flow purchase price-closing costs-holding costs-worst case rehab cost = offer price.Bottom line, without any idea of the condition or a rehab budget, no one here is going to be able to offer you a purchase price in good conscious.  

As far as commercial goes you will need to do a few more inspections than residential like Phase 1 environmental, water pressure, septic, commercial building inspections and depending on the age of the buildings lead, asbestos etc. 

DWQ, Army Corp or any other environmental requirements or permits.

@Devyn CaraballoI’m in New Hampshire and our Dept. of Environmental Services has a fund homeowners can tap into to help pay for the clean up of leaking oil tanks.

Thank you VERY MUCH and as someone who is a semi-beginner (to conscious REI’ing) and perhaps starting a little later in life then some, I appreciate your detailed input and it makes me feel good to know that my instincts weren’t too far off, i.e. get something to live in and force appreciation.

If that's the case, you can't do any renovations until you have it professionally deleaded or it would be flagged for Unauthorized Deleading and you can get fined and the property would never be able to get a Lead Certificate, only a letter of Environmental Protection that states you did illegal work, got caught, then had to pay a professional to clean up the mess.