It would end up being mathematically identical, assuming everyone is doing their math correctly. 

These combination nowadays only available in US of A.It's very simple mathematics.

Mathematically you will drown without the income to support the house payment.

There are a few ways to conceptualize cap rates - mathematically it is just (some version of) NOI or Value; economically it is the price point that matches supply and demand of capital to invest (more capital to invest -> values go up -> cap rates drive down to competition). 

People often keep it at an abstract level and decide what to do rather than running the actual scenarios and deciding it mathematically. 

Mathematically, I don't think it will meet the 1% rule or any of the other "should" parameters. 

My method is mathematically intense. 

But here is my gripe with seasoned RE folks on this message board - as a former mathematics teacher and now VOIP engineer, I can relate to how intimidating a new career or learning new info can be.  

CAPEX: If you use a very sharp pencil, have an engineering background, and a crystal ball mind, you might be able to arrive a mathematical formula to calculate CapEx reserves.

it works out mathematically that with the right combination of checks you can always get within $1k of the bid.