When you don't have cash, you need to partner with individuals who do. 

Joining Bigger Pockets hoping to accelerate my learning process and meet like minded individuals.

Gray area interpretation up to individual courts which have rendered seemingly contradictory decisions.  

I think there are two maybe 3 ways to look at this in my mind.  1) you go into it and bring it all up to modern standards but using that old charm to basically take what is there bring it up to modern standards and rent it out essentially I'm thinking cocktail bar or something trendy like that.2) most banks are on really good centrally located real estate if this is true, then I'd consider it for the dirt, plan to scrape the lot and go vertical with whatever the highest and best use is.3) a kind of combo of the two, if the lot is in a good location and its doable, pull the vaults or other "character pieces" out of the building, scrape the lot, and build whatever is best suited for the site there, but incorporate those historical pieces into the final designs.Is the site near a major retail area? 

Requiring the homeowner to replace the pipe individually would seem like a huge octopus of inspections and enforcements and etc.

definitely split the lot would be the highest and best use I would assume and sell them off individually 

I am a small investor in the Tucson Az, area looking to meet and learn from like minded individuals.

Is this because you had a PM with insurance for this kind of thing or was this a clause in your individual building insurance policy?

Giving away the place cheap only creates more work for yourself screening lower income individuals, and attracts scammers.

The Plus subscription would allow you to keep track of each property/project and produce reports for them individually in addition to keeping track of the entire business as a whole.