I am switching to a wholetail type model since the regulations against wholesalers are coming more and more.

Wholesaling is attractive model but like everything else it take commitment and consistency.  

In Chapter 9: The Multifamily Millionaire Model, Turner explains how you can use the cap rate formula to increase your ability to make wealth.

I recommend sitting down for an hour and learning how to develop a simple model in Excel yourself.When looking at properties you will often time have edge-cases where there are unusual sources of income and expense that might not fit in a calculator like this.

So, if you can find a make/ model of the door, that might help inform you as to how old it is. 

It looks like it is a gas water heater but if you're still not sure, you can always check the model number in a google search.

With you having taken the program, do you think the courses were built based on someone who already have knowledge in real estate or someone like me whose only knowledge in CRE are based on Forums, Youtube, free crash courses on financial modeling, and internet searches. 

There are certainly outside cases, but you wouldn't want your business model to focus on that.

You should be receiving some type of quarterly statement from the GPs of the deal showing how they are doing and what the NAV of your LP ownership is, including income you've received.

It’s not a performance based model unless you negotiate a bespoke contract, or have a larger portfolio.