My question is: Is this normal NOT to show sales data when between institutions such as banks and HUD/VA?

.,  and put visiting nurses in it or found a corp. needing weekly visitor housing.Since I do mail marketing and look at a lot of data, I've always been curious about the NY/NJ/CT people who own in CA.  

The three day bootcamp is a good way to learn how much you don't know - but don't get tempted by the online websites and data sourcing they can provide you.

We have others with data science and other expertise.  

The first step would be to use zillow... go to mortgage section and input data into their calculator.

There is a risk of getting stuck on any detail be it financing, property selection, taxation or tenant screening (another example: people have posted some formulas so complex and burdensome enough that I am not sure they are sustainable or realistic in light of the recent data that most US renters are financially fragile, (Just Google Financially Fragile Renters, FINRA)... 

If you continue with this option I encourage you to use an attorney experienced in creative financing and ensure that the proper documents are file with the Court in order to protect yourself and to "cloud" the title.  

One of which is a 4 unit.Now, this guy sent me a table with the information about the properties and two rows of the table gave Zillow rent and zillow estimate (for the current sale price of the property).I've already checked all of the local assessment data on the property and all of the estimates are almost double what he has paid for it.

However, we always want to ensure our terms are transparent and I will share your feedback with our team here.

To be specific, how much would one typically pay an attorney to review and or modify their contracts (A to B and B to C), to ensure that they are legally binding, they can be used without penalty, and that offer the investor the protective clauses?