@Allen L.Hi Allen,Licensed agent here and Infinite Banking Concept practitioner using whole life insurance.Great questions all around!

However if I do a BRRRR I can achieve infinite return by extracting all of my investment.

It's those deals that fly off the shelf in under 24 hours, but you bought it cause you were first. 

Payment of x for first 3 year then increase to z yrs 4-8.The possibilities are literally infinite.

Just one of an infinite number of unexpected issues that can come up and cost tens of thousands.  

Now receiving an infinite return rate.

wholesale shelf corporations''  

Ultimately I achieved an infinite return on my investment: without having any money in the deal I flow roughly $450 monthly and have around $100K equity in the property.

Investment Info:

Single-family residence buy & hold investment.

Purchase price: $134,000

Cash invested: $44,280

This was a perfect house hack with buying a home as a primary residence using a 10%...

I shoot for 30% to 40% (cash flow plus equity growth) and am trying to push that up to 100% (or infinite) like the master, @Joe Villeneuve who would buy that house for 20K, put 15K into it, have it appraise at 50 and refi out his entire 35K investment so that he has no money left in, cash flows, and has his cash back to do the next deal.