@Brian Garrett any chance you have the link to the thread? I've been doing everything I can to study up on the refinance portion of the BRRRR strategy because it seems like there's limited options to move with velocity:
1. HML (with down payment in most cases) for purchase plus rehab, which then can be traditionally refinanced out of the loan portion, but if you brought cash to closing, that can't be returned unless you season six months
2. Cash purchase and cash rehab, which you can get traditionally refinanced out under six months with delayed financing, but your rehab expenses can't be returned unless you season.
3. Obtain some form of creative loan where all your cash in the deal is recorded off the settlement statement and is negotiated by you and the purchase lender. You then rate and term out of that loan, and the original lender returns your funds. That seems to need either creative HML (not all of them have a product that will put your down payment into a vehicle it can come back to you), or using an entity such as mentioned in this thread (which is a new trick I hadn't seen).
Still, understanding what the hard-written Fannie Mae rules are that allow rate and term faster than cash out would be good for my learning so I know why #3 works.