I already own 4 other properties as buy/hold, but I'd like to quit my W-2 job and get into flipping because I'd rather be out on a site than sitting on my butt on a computer at my current job all day :).With that said, how are my prospects on getting a HELOC and using those funds to buy properties?

Sometimes it's just a plug and play, or it may have to be a big plumbing job.

Unfortunately that property is in a poor location, needs a lot of updating, has baseboard heat, and butts up to the railroad tracks.

--always factor in property management even if you don't intend to use it, depends on your area but in mine can get a decent company for 7.5%, other areas are higher or lower.you can use the BP rental calculator (look under tools), among others, to plug in these numbers and play with different scenarios.You need all this to get an accurate cash ROI number and determine how much you want to offer. 

Is there a platform out there or a system I can use to identify these names that are on 2, 3, 4, or more of my different lists just by plugging in the names and addresses?

Get the estimate for repairs plug in the numbers based on anticipated rent and go from there.

Finally, my own plug is I've been running my own mastermind group with such great success I had to take a brief hiatus so that several of us can go buy an apartment or several together.

PBC, Broward and Miami /Dade counties)  where an out of state mortgage broker would get his or her butt kicked as there are banks and private lenders who only loan in their footprint, but offer terms that outside lenders can't touch!

To know for sure, you have to plug in the numbers and analyse/compare the results you get for each scenario.

I always start with the unsexy stuff that can bite you in the butt when the inspectors and appraisers show up.