The classes you will take do not teach you much about being an investor other than some basic math and a few key terms.

Depending on what your plans are after the 5 years fixed are up, this is a simple numbers (math) problem...as it always is.1 - Since you are getting $9400 back at closing, that means you are out of pocket 9400 less with the higher interest than the lower...which puts you 9400 ahead at the start.2 - Over the next 5 years, your cash flow will be about 130 less with the higher interest rate, however...3 - That only totals up to about 7800, which means over that 5 year period the higher interest rate waves you about 1700, but...4 - Since it will take you 5 years to reduce your cash position from a +9400 to a +1700, and if you invest the 9400 ASAP, the compounding effect on that immediate 9400 extra cash will make the minimal look of "only a 1700 savings" immaterial. 

Usually the answer is "No", because it's a math equation.

I was also considering using them but the math didn’t seem to make sense for me.

Your expenses are too low:Need management (10%)CapEx & Repairs should be closer to 7.5% eachMy math shows that your cash flow will be -$50/month, that's negative.

Do the math before hand and figure out how much it will cost you to buy land and build then do a market analysis to see what price you can sell it for. 

Bad news is, if you think you'll be into it for $100k over appraisal once all is said and done, this is a very simple math problem: if you were to sell it as is right now, would you lose more or less than $100k? 

I will try to do some math on the basic big items for now.

Am I doing that math wrong?

But he did the math and said the break even point was at $60k which I surpass so it definitely has been worth it.