In large part leverage can accelerate returns.There are also many variations in RE.  

Variation: same job, but no plans to retire or move, i.e. no intention.

I advise clients not to solely rely on AirDNA data for performance analysis as there can be some variation based on amenities such as hot tubs, premium decor and design and general operational excellence. 

I've used other variations of their wood looks as well.

Which if youve done flips , but not commerical multi before, you wont miss much,  however a 6 fam is a commerical code permit so there are slight variations between the residential code for essentially all trades which if you dont have a detailed plan and you dont double check every code before you do anything but rely on cheap labor to do your due diliegence for you, what could go wrong ? 

Year-over-year, rents are down 1% as of March 2024. 4The data shows significant variation in rent growth across different Denver neighborhoods in recent years.

At that point my current HELOC will be free to be used on the next property and I will rinse and repeat, so "yes" this is a financing variation of BRRR.

What you just described is a variation of what I refer to as a perfect system.  

You will start to see the actual variations in the rate. 

The bottles were now selling at auctions and one variation was going for $3000!