I made a simple website from Intuit and linked with a ZOHO database that notifies me when someone has filled out the questionaire.

As such, when a client wishes to sell a property, we already have a large database of potential buyers.

Begin to use my email marketing account to communicate twice/month to my network of agents, wholesalers, cash buyers and other flippers (I use iContact database).  

I do agree your SOI or your database is huge on staying in touch.

The real data costs about $6.00 since 95% of the time it is only a super fast database lookup.

In the last week he has reserved over half of this portfolio to his database.

Forbes.. https://www.forbes.com/sites/realspin/2013/06/12/dont-buy-the-hype-college-education-is-not-an-investment/#6440f2175e02"...The most glaring flaw is that it draws a conclusion about future conditions (earnings that people who go college now can expect) from data based on earnings for college graduates going decades back.

When I was an intern doing some database related tasks with customer management, I realized that a lot of contractors that are working in the comp sci were foreign and extremely talented.

They say on their site that they have a database of tenants. 

You should also look into FMV on the HUD housing database for your area of interest to get an idea of rents they will pay.