Over the next few months I will be hitting the books hard to familiarize myself with the mathematics until it is my second language. 

In other words, a lower loan amount with a higher rate is mathematically equal to a higher loan amount at a lower rate.

The "liberal arts" approach would be to tell you that sophisticated investing precludes buying either equity or cash flow - we create both, not buy them.A more mathematical answer would be to tell you that the 2 most applicable measurements of ROI are the cash on cash return (CCR) and the internal rate of return (IRR).  

I have a mathematics and physical education degrees.  

I have a mathematics and physical education degrees.  

From a mathematical standpoint, it sounds like they're trying to raise $1M for 1 year, and are offering 10% + a percentage of the profits, with a minimum of $25K.That means a minimum return of $125K (10% of $1M + $25K) for the $1M investment, or 12.5%.

Some tenants are just mathematically challenged.

@Jameson Triplett There's a lot of mathematical ways to look at this.

However that is only one side of the mathematical equation. 

Simply put there will NOT be any housing market collapse or crash and I can say this due to a little thing called mathematics and facts.