1.Finding Value: Identifying properties with strong upside potential is critical in markets like Antioch.2.Rehab Management: Staying under budget and on schedule ensures better cash flow and quicker refinancing.3.Leverage Matters: The HELOC strategy allows me to scale quickly and acquire more properties without tying up personal capital.

To me, that is extremely critical.

Wholesaling real estate is a great way to start as you must become familiar with deal underwriting and deal sourcing. 

Would greatly appreciate advise on how to start sourcing the land and/or connect me to land brokers who can help.Thank you in advance!

This will give you one critical piece of information, that it may take X days to get an offer and sell, and the second item will give you what your competition is right now.

HUD.GOV is originating source for FHA loan info.

For most, this isn't a realistic option so they update some of the most important regions themselves and copy the data from other providers where they don't have coverage.This is a big problem with these big consumer-grade real estate analytics platforms—you don't really know the source of that data, its frequency, etc.

When trying to analyse STR I try to use as many data sources as possible, AirDNA, Rabbu, Pricelabs and good old networking, ask around see what other investors are getting for their units. 

The later is critical to protect your investment.

I did not want to simply rely on one source so I figured there are people here that would be up-to-date if such a manner was so as well.