Your post is just, hey can someone explain BRRRR in general, but you really want a more streamlined answer and someone can only give that if you give more details about what you are unclear about and what you want to do.

If you have a HELOC you can buy pretty much any house with any LTV because it is your cash to use however you want.We have some free classes that explain DSCR loans more with examples, please reach out and I can send those over. 

Then I explain my process in brief and simple terms: background check, lease agreement, collect deposits and ask if they'd like to proceed.

Joey / I'm not familiar with that approach and I am sure someone will chime in to explain.

Explain that as if I’m in elementary school lol :)

There was this guy on youtube that explained it quite well (have a look from 07:59 onwards)I watched his other videos on the STR markets for Marbella and Valencia... quite interesting content. 

It explains the team that you should develop to have a strong foundation under you while investing remotely.https://www.biggerpockets.com/blog/core-four-real-estate-team

Summary from what I have read and what was explained to me.

The husband was not there due to temper explained the wife.

The decision of which one to use makes more sense to me now since you explained your reasoning.