The process must be understood and applied to team building, investing your and 3rd party capital, and financial deal structure with debt and equity sources. 

And you still have $70,000 to go buy a single-family home or multifamily home, and now that you're on a bunch of wholesale lists where you can source deals well under market value it is easier to find good deals. 

And to make a BRRRR work in the current market, you either need a crew that can do cheap work or a way to source deals.

Know this: the #1 reason why landlords fail - failure to manage to the lease (source:  American Apartment Owners' Assn). 

I recognize this is not the sole source of return, but the other sources have their return increase with smaller equity position. 

If you believe that is true, please cite a source.

I suggest you find other sources of income or partner on deals to grow your real estate portfolio.  

And she's hardly saving money if she's using an electric space heater as the only source.

I was determined and wanted something that I could sustain for the long term for my family's livelihood and control the effort I put in and the results I got from that effort.I specialize in sourcing properties for fix and flip investors nationwide (wholesaling, but with real-world experience and closed profitable deals for myself and my investor partners) with a roadmap to acquire rental properties as finances permit.A lot of our deals are currently coming through organic search as I have a background in substantial traffic generation through search engine optimization and organic means.

Simple answer - yes you can alter your funding source after putting it under agreement if you chose to use a hard money lender instead - i would just communicate with seller that hey I was going to use cash (assuming you have it from your heloc) and instead will finance some of it but let them know its not contingent on financing.