is there a particular website that has the application.  

I'm a web developer/ real estate investor and I just started playing with Dapps, is anyone else working on similar application?

He doesn't have a website. 

You will find many resources here on the forums and throughout the site as well.Personally, my short list of books to explore:Set For Life by @Scott TrenchRich Dad Poor Dad by Robert KiyosakiABCs of Real Estate Investing by Ken McElroyABCs of Buying Rental Property by Ken McElroyLoopholes of Real Estate by Garrett Sutton, EsqTax-Free Wealth by Tom Wheelwright, CPAThe Power of Zero by David McKnightREIT Investing for Beginners by Lawrence SmithWhat Would the Rockefellers Do?

My challenge is that I’m struggling with figuring out if a property will be profitable or not, even though I've done research on sites like AirDNA and tried to analyze multiple factors.where Im stuck: 1. 

In an effort to bring ANY $ in to help cover the mortgage ($4600 including taxes and insurance), I put together an AirBnB site for the property and set it live, with zero expectation.

@Drew Shirley I am in the vast minority on this site regarding co-signers.

One mistake I’ve made in the past is relying too heavily on numbers provided by various real estate websites, so I’m curious how you’re verifying the property’s financials.Looking forward to hearing back!

These are the keywords that stand out to me in your question:sources, websites, best deals, systems, step by step, factors.You are focused on all of the wrong things.

It's different coming from someone who has been around the site for a long time.