I think that's true and LU doesn't claim a secret formula as far as I've seen.

Between 60% and 75% is not bad, but it is not in the credit building range. 75% to 100% is a giant red flag and will likely be detrimental to your FICO score as well.What is that SUPER-SECRET FICO FORMULA anyway?

I believe in that magic formula. on the personal level, I am struggling to be disciplined to make this part of my routine.

Use the RATE formula to calculate yield. 

There is no magic formula.

I ran a ton of numbers using formulas I learned here on bigger pockets and did a ton of research. 

Has anyone heard of this rule of thumb formula when purchasing 5+ unit multifamily buildings?

I've also added bedrooms to places which changes the formula completely so you need to start going in and looking at places and know what the rent possibilities are based on the current market.

Hi Freddy,Have you heard of the 70% Formula for determining your offer price.  

For the business value there is no set formula.