Most focus on rate and amount of cash to close but bad loan administration or bad loan administration policies may cause the project to be far more capital intensive if viewed beyond day one of funding.

that was not a method that Armando taught in the seminars I attended these were strickly how to find BRRR props and rehab them and then resell or refi and keep.. the Markets we worked were Vegas and Orlando and Frankly those investors who actually bought property doubled their money or more with the deals i funded for them and they bought on their own it was 2011 to 2013 which as we know was a prime buying time and had to hand it to Armando he picked two of the best Markets.. 

That will leave you with limited funds to actually purchase the house.

I think that equity gains in good areas tend to outstrip the value of cash flow in the long term but if you're pumping money into a rental property you're going to need a hell of a lot of equity to make up for not only the additional funds you put into it, but the opportunity costs lost in that money and the money that's in the property. 

While engaging with the Bigger Pockets community, I've noticed many investors seeking funding.

Also, if you have cash to complete the purchase, you can get preapproved and then make an offer with proof of funds and without a financing contingency with a standard 30 days to close.

You can do a trial and see if bank feeds connect, if it does, I would then recommend using it over QBO.One of my client that just started in development is short on funds so Xero was the only best option and they are using a local bank so we couldn't connect and a lot of manual entries. 

I did not read the rules around security deposits. you may be allowed to use those funds and still file a small claims action for any remainder, but I can't imagine that it would be worth it if you have at least one month's rent in security deposit. 

If you really want to supplement your income, my thought would be to take out a HE loan (or some other 2nd position loan) and use that to fund a down payment on a property.

This can give you the flexibility to fund your flip without the restrictions of a HELOC.