The simple ROI formula is profit divided by total cash out (leveraged funds excluded).This is why you can often see huge and even infinite ROI numbers when the cash outlay is minimal.Example, down payment, utilities paid, renovations costs not financed, insurance payments, and all other cash out of pocket equals your cash investment.

You'll be using 100% OPM and earning an infinite ROI.

Since infinite banking concept is based fully in excess contributions.

Galvanizing copper is a chemical impossibility.Projected lifespan of galvanized piping is typically projected at 60 years, but it can be less or more depending on the water quality of the source.Copper is generally projected at 80 years but same caveat.Lifespan of plastic is for all practical purposes, infinite. 

In lies my initial point on contention; i see this is a cyclical argument thus putting us in a infinite loop.

I put a tankless in my old house, which is now a rental.Advantages are:-infinite supply of hot water-smaller footprint-more efficient.

You can get infinite returns that way.

There is an almost infinite number of opinions about the right way to be successful in real estate so be careful which advice (path) you follow.

We can lay out an infinite number of hypothetical examples and what you could do, but the common theme is that you should try to understand what the seller wants out of the situation and find a way to fulfill that need.  

The deals that I've found and worked myself have given me much better returns than offered by most syndications - especially when I have very little of my own money down (the returns can be infinite with no money down).