I Love the BRRRR method.

My question is surrounding the best method to capitalize on the equity I have accrued or if I should pursue outside money to get started on my investing career. 

The power of the BRRR method combined with using a HELOC should be great.

For more pointed advice, you might have better success with more specific questions.... for instance, what are some marketing methods that work for other people, or how do I meet buyers.If you want one big, general piece of advice, it's dig in for the grind. 

Long term hold is the tried and true method for creating real estate wealth in Austin.   

That'll allow you to setup sub-accounts that can purchase using your payment methods (and for you to track the spending), request bulk pricing on items, and apply for NET 30 payment terms (this is awesome).We stock some doorknobs but try to transition all clients to master-key systems.

Assuming it is reasonable to expect tenants to email the filled out application to me, the only major draw back I see with this method is how to collect the application payments. 

So now they ask me, which of these paid marketing methods is better.

@Jason Jinks,A core method for wealth building is (a) accumulate cash, then (b) invest said cash into passive income.

Picking a % because some stranger at one point "said it" is ABSOLUTELY no reason to adapt them.Look , if you are going to blindly follow the herd you will most likely end up where the herd is.And look around you.