In 10 years, you might have to replace 6-8 HVAC units, a roof, your hot water heaters, and some other miscellaneous stuff at worst, but on day one, you should reasonably be able to identify what will be needed coming soon.

You have 45 days to identify the replacement property.

This made me very incompetent and scared when trying to identify properties) After Identifying markets that will work for me from analyzing 100 properties, I will go on a massive networking campaign to connect with people in my identified, desired markets.

You simply have to identify the property you’re going to buy within 45 days which it sounds like you already did. 

and I explain about how there are these hidden markets waiting to move to the next stage of growth, and how I sometimes identify properties to take advantage of that growth.

I guess you first need to identify what it is you want to do in the RE business.  

Trust me when I say identifying a good property manager takes time and previous experience being a landlord, to know what to look out for when you are interviewing companies.

I am going to a tax sale and have identified a few rental properties (2 to 14 units) that I plan to bid on.

Once you identify it for them, and they "did not know" they technically should have to adjust and disclose it if your deal fails so they have an incentive to credit you and stay in the deal.

Depending on your situation, identifying and addressing weaknesses like access and utilities may allow you to market property better and bring a greater return.