This is the part of the tax law that controls whether the money we spent on fixing something on our property is treated as an expense or as a capital improvement.The Regulations I mentioned are extremely complex and confusing. 

I think you're getting cold feet....J U M P.

Hot water is usually separated it is just the cold water that is often not.For a very large building a flat fee is the move because the back billing and tracking of who paid for what would be hectic, but for a small MF like a duplex it is very easy.I split the bill by the fractional amount of people who live in the unit.In other words, the amount of people that live in the unit divided by the total amount of people living in the builidng.So if there are 3 people upstairs and 2 people downstairs.the upstairs pays 3/5 of the bill, and downstairs pays 2/5.No need to separate anything, you know the tenants will cover 100% of the bill and this approach is fair. 

Networking and cold calling/texting is what's always worked for me.

This is extremely helpful. 

Willing to help out with ground work or if you need me to cold call people or door knock.

Often times inspectors overlooked them as they are very small and minor but as you can probably already tell, they are extremely important and prevent water intrusion.Your best bet would be to contact a very reputable Siding/roofing contractor and have them go through the entire property and put in the proper drippage flashings seals and caulking necessary and have them insure the work. 

Also, cold call a couple of the bigger landlords in your area and ask them (or their secretary) which attorney they use.

If you where going to be able to recreate the orginal layout, you would of been able to do so by the clues left behind by remaining framing, be it the "honey" holes where the toliets once where, the sizes of the holes in the joist would indicate what pipes ran where be it hot and cold supply, toliets, showers and other industry standard tell tale clues. 

If you are buying from a major oil company, their contracts are extremely complex.