After looking at your post, I realized it's probably necessary to have a dedicated real estate attorney handle this issue for me since it's serious and I might make a mistake big enough that probably will cost me too much money to fix.

Or should I just have them install another meter for the third floor to avoid any potential issues going forward. 

@Shaheen Ahmed maybe look at this in a different way - where are you going to invest where property taxes are NOT an issue?

Lender A misses this or doesn't have this knowledge and then tells you a week before closing that your rate is changing because the program they quoted wont work once the issue is caught. 

Title issues tend to be the fact pattern where properties are truly not financeable but that's rarely the case when you see the "cash only" adverts.Ultimately, proceeds will be transferred through a title company and its not as if the buyer is showing up with a duffel bag filled with cash.

I know I know getting property won't be an issue, I've done it once and that experience helped me so much, but what if i wanted to acquire two properties this year?

Why are you entering a hospitality business to automate your (im)personal responses when guests have an issue?

There are cheaper one’s in D/F areas but I would be careful as those can create a laundry list of additional issues.

The moisture issue and structural issue need to be addressed and you can do so before the insurance adjuster comes out.

My STR had 15 Mbps, and I could stream Netflix on four TVs and a mobile device without any lag.