I don’t, until at the level of doing cost segregation studies.  

@David HokeHi David, I too have done the RALA home study course and can give you great feedback - just PM me.

I had material to study, home work to do, some field research and then to present to my coach every week.

And they can not buy a foreclosure for their personal benefit.As to your comment "I'm spending this week learning about foreclosure investing" the first thing to study is RCW 61.34.030 Criminal penalty.make sure you understand what that means.

Study the market.

Stay inside most of the time and read / study. 

Yes, you can do HELOC but not want to dive into the nuancesI would rather be Avatar 1 that leverages debt by purchase rentals consistently for low down vs tying up cash into 1 house hack at 20% down.Backing in my answer with actual case studyI recently put together a case study of one our clients that has done this every year consistently since 2016 and is now on his 7 house hack.

What ecosystem did you study, what guru?

Here is a solid case study where one property achieved $242k in revenue in its first year through the art of smart design and strategic amenities.What Made This Home a Standout Success?

Study the market.