I am wondering who has done the BRRRR method as an investor and what institutions are investor friends for multiple BRRRS.

Is there a method to the madness or just a shotgun approach until you find one that works?

Now private lenders are my main purchase method, along with seller financing and BRRRR.

I've only seen one person spell it out clearly, but I'm not sure his method is how everyone else views the Rule.  

This is sometimes called the "Enemy Method," and you can search for more details.3.

If the properties were placed into service in 2022 or before, you may need to file form 3115 (change in accounting method) to factor in the 'updated' depreciation schedule from the cost segregation study.Best of luck

These self employed 2nd mtg's are typically based on alternative method of caluclation like profit and loss statements if you're self employed or the last 12 months of bank statement deposits using a formula to derive an income from these deposits (like 50% of all annual rolling 12 calendar month deposits X 50% /12 months = monthly income).

Quote from @Lucas Schlund: @Ty Coutts What method would you say is better for a beginner investor, using max leverage on your first deal, or using more cash upfront to put more equity into it?

There a few other advantages of this email method. 

DSCR works pretty cohesively with hard money, especially when you use the BRRRR method since it allows you to increase leverage on the back end refi.