People calculate ROI in different ways so make sure you understand how your realtor is doing the math. 

Either my math is off today or your math is off today but those numbers don't suggest you made $200k.

I am having trouble getting my mind around the math to see what my cap rate and IRR would be. 

While I think Dave has some great points about the risks of debt, I’m gathering that his math is seriously lacking.

You can get an FHA loan with 5% down, assuming you're going to live in the property (for at least 1 year).Deal 1: My back-of-the-envelope math (assuming 25% down) says you may be able to cashflow ~$180/month.

I was a senior in college studying business management, evaluating my personal financial situation, and determined to be a wise steward of my first paycheck after I graduated, knowing I’d be climbing my way out of about $20,000 of student debt and several grand in auto loans.WhIle searchIng for somethIng productIve to lIsten to on a jog I found the bIggerpockets podcast.Ive learned more from BP than I ever dId In college.Despite math, my wife and I made the personal choice that we’d pay off our student and car loans before we got started.Fast forward three years later we paid everything off and saved $20,000.

Could some one double check my math?

If you do the math I ended up making $120k MORE THAN MY INITIAL CALCULATION!

So I am looking to learn the math when dealing with R.E., is there some special quadratic equation that I need to have handy to be able to calculate APR, interests, etc. how do I figure out how much to charge for rent, things like that...

Any realtor who understands the market, can listen to your needs, and knows some simple math should be able to help you with this even if they're not a BRRR investor themselves.