I assume you'll self-managing when you move out so also a safe bet is to make sure it cash flows with management thinking about the future so when you grow or no longer want to manage you still have positive cash flow. 

You have a duty to your tenants to provide them with a safe environment. 

It is my understanding according to dodd frank of you go through a rmlo underwriting an owner occupant bier you have a safe haven from being sued n federal court from a seller saying that the buyer was not properly underwritten as per the Ability to Repay Rule.

. $100,000 a month in income by 2025I plan to achieve these numbers by way of acquiring as many doors as I possibly can by any (legitimate, of course) means necessary, in a financially safe and responsible way. 

I'm going to assume that I'll hold the property for 3 months before refinancing to play it safe.

This will instantly tell you how safe your money will be.

Since you tested the water already , and its safe to drink, that is your next step. 

I started researching leak detection devices, and was wondering if anyone has experiences good or bad with these.  

If you can get creative and find a way to invest safely without the TK, I think you can save some money and increase your returns. 

As a buy and hold guy I am looking for greater security than a wholesaler or flipper might have seeing as they are going to get out of the property, ideally before it floods, and I want to have the home kept nice and safe and dry for a long while.