You can tap those Doctors as potential fund sources for future investments.

All the information I have are from various website but I like to get to the original source.

Lots of buildings have a single hot water source for multiple units. 

A source for listing agents to attract buyers and reel them in.. but if you pay the monthly subscription you will see newer listings..8 years ago it was dirt cheap now the jacked up the price like 500%

Only sources of depth in information I could find are YouTube videos from agents.

Loan "guidelines" are what banks or brokers must fit your deal into to satisfy the actual money source and they all make up their own rules.

@Todd Rasmussen do you have a source on the face to face law?

Every market will have investors who are willing to pay less than the market cap and investors who will only buy if it's higher than market, but the average investor in that market is going to pay that cap rate.Large national brokerages track sales and cap rates from those sales and can be a good source for generally reliable market rates, but the reality is that there is no one source with the exact (agreed upon) cap rate.It's very similar to residential in that it's not an exact science.

He then let me know that no obvious sources of a leak are known of in the home and no evidence of leaking is happening, but the high water bill is an indicator of a leak somewhere.This brought up a fundamental question that I wanted to put out to you and learn from you on:  if the tenant pays the water bill (it is in their name with the city) and there is  SUSPICION of a leak, who's responsibility is it confirm (and pay the fees that would be associated with confirming and/or finding the leak)?

There are multiple ways you can go about it, and you should reference multiple sources to verify what you find either way.