I currently have  1 Business Bank Account that is for Master LLC and stuck on best way to manage cash flow  and flow of funds between account for all master expenses related to my business setup vs and also expenses/ rent related to the properties to ensure that I keep things clean, simple and easy for reporting, taxes.  

Also, in a 1031 the seller cannot take possession of the funds so you giving him the downpayment to do repairs would be challenging.

In the Pace Morby parlance I have come to learn that the gap funding or equity component is called and ET or "Entry Fee"..

Partner Driven funded this transaction by leveraging a combination of internal capital and strategic partnership resources.

To fund additional investments, consider side income, creative financing or creating a timeline with your co-owner for converting property B into a rental to generate cash flow.

They allow you to get funds at more favorable terms than with a loan or credit card.

You mention using the funds as a down-payment on a property. 

I write Millers Mutual for a lot of those types of properties in PA and Ohio.

When funding is plentiful and flips are rare, the competition will be heavy and experienced flippers with teams will take smaller returns just to keep their guys working, which means inexperienced 1-man crews will be shut out of the market.

now that my first property is running smoothly I have been thinking of starting to look for my second one once my funds are in order.