If anything, they all deserve a tremendous amount of credit for pushing things further and to helping us get (hopefully) closer to a theory that is complete enough to help us understand how economies (and the world) work.To call those who believe in Keynesian economics stupid (or to call those who believe in supply-side economics stupid), would be like calling those who first said the earth was round stupid.

Studying how people and companies that have had tremendous success is a key to your success.  

The area is experiencing a tremendous amount of building, old dilapidated properties or lots are being transformed and the area is definitely on the rise.

It may be sometime before we see appreciation but the upside potential is tremendous.

Not so much for appreciation, but cash flow is tremendously great if you buy right.

This is going to vary tremendously from location to location and as @Christopher Phillips said, the best you're likely to get is the initial balance, after which you can do some math.  

After the ADU was built I was able to refi and pull out 80% with a traditional loan and another 10% with a HELOC , and was able to pull out everything except the original down payment (60K) but it was well worth it because of the tremendous cash flow I have on the property.The main house rents for $3700/Month the ADU sections are renting at $1,800 per unit  including utilities(there are 3) so the property is grossing $9,100. total utilities, water , gas & gardener expenses are $400  per month (I have Solar on the property , so no electrical bill).

A real estate licensee has tremendous flexibility in finding properties that he likes and being able to use his commission toward purchasing the property. 

You will learn a tremendous amount about how to do things and how long it takes.

@Dave Foster, thank you, tremendously helpful!