Are there specific tools or methods you rely on to get more accurate estimates?

Quote from @James R.: There seems to be a glut of STRs in every major market, yet there are RE agents out there telling people that there is demand.There may be demand, but if the owner cannot book their place to cover the costs, how can RE agents be out there telling people that it's a good investment? 

Deciding between an SFR or a BRRRR strategy can really depend on your risk tolerance and the type of cash flow you’re aiming for.The BRRRR method can be great for long-term equity building and maximizing your returns if you’re up for a more hands-on approach, especially in markets where property values allow for renovations that increase value.

I will even go as far as paying for the UHAUL for local moves and using the proactive scheduling method..."

I've gotten to know the syndicator, the methods and the underwriting used.

I've just closed on two turnkey deals in Memphis and so far it's been a good experience, so just weighing my next options and I think the BRRRR method will very likely increase my CoC return so just trying to build up some contacts should I decide to go that route as my next experiment. 

Just a different method. 

The BRRRR Method is really designed for this - I'd recommend buying the "BRRRR Book" in the BP bookstore and following that strategy - it basically outlines this exact gameplan in the opening chapters

Also, I hear that many millionaires have Roth IRAs, but if they can only contribute up to $8,000 a year, do they always have to use the backdoor method to contribute more?

You could even consider an AirBnBRRRR strategy, which combines short-term rentals with the BRRRR method.