It's not super complicated, but you can pull out cash to rehab the deal and then put it on the market with no prepayment penalty. 

I am about to close on a deal to do midterm rental.

Did you target a location and find a contracting company first to be prepared before hunting for deals?

BP has various tools to help you analyze your deals (rentals, flips, wholesale, etc). : https://www.biggerpockets.com/investment-calculators7.

I don't find any of them to be a big deal.  

I have noticed, the more business I bring a lender, the more flexibility in guidelines, rate, and terms I get which results in better deals for my clients. 

I'm looking for the a platform similar to this, where I can get daily leads, and a deal where every time I close on a property the lead company would take a portion of the wholesale fee.

I was originally planning to put all my monthly returns to pay down the HELOC as quickly as possible so that I can get into the next property but am worried about how to deal with paying the taxes if I don't allocate any of the returns to the side.

Been trying multiple sites or softwares like dealio, crexi, zillow  in finding the best deals.

Make certain with your underwriting of the deal that your new property cash flows any loan used to purchase it.