@Matthew OrmeYou certainly can use BRRRR under the umbrella of an IRA and the benefits of such a strategy in terms of maximizing return for cash deployed will apply.  

I've done quite a bit of research on buying real estate through a self directed IRA with rolled over 401K funds.

I have a SD-IRA and I need to deploy.

Can we use money from 401(k)/IRA's in this project?

I have set up a Self-Directed IRA and funded it through Advanta in Atlanta.

We have a new Real Estate Fund and need a reputable custodian that can help our investors convert their IRAs to self directed IRAs so they can invest these assets in our fund.

I have a note that I bought from my SDIRA and now I am finding out that I have to obtain an EIN for my self directed IRA.  

Buy another property, rent it, and take the depreciation -stay focused on your portfolio. look to use tax free or tax deferred IRAs or 401ks to reduce taxable income. 

Just keep learning the lingo of the business, get people to trust you more and more, and you will hear that POF roadblock less and less.For issue #2: I would start with your local REIA, the Chamber Of Commerce, the Rotary Club, charity dinners, seminars held by IRA custodians and anywhere that people hang out that do well and probably have money that they really don't know what to do with it.  

Also ask people on your network if they would like to earn 10-12% on idle cash or IRA funds secured by real estate.