IRR is just a mathematical solution and can get nonsensical when there are lots of ins and outs (you can have cf's that do not have an IRR or have multiple solutions...multiple IRR's). 

One more thing...I really enjoyed the fact that you guys took the time to mathematically equate my expenditures, gains (ROI).

I should definitely start doing this to get some first-hand experience with the area.I have a degree in Mathematics and work with numbers daily so I definitely understand the importance of being comfortable with the quantitative side of things.

It's a mathematical problem for me.Now, once values reach 10X earnings, I think you start seeing things slow down. 

Like Albert Einstein said, "compound interest is the greatest mathematical discovery of all time."

Find that answer and manifest that answer onto your website.I have turned ranking #1 into a mathematical equation. 1 + 1 = 2 no matter how often you do it.These are all people that used that equation to rank.

If a mobile home is attached to real property (private land) there is more of a mathematical equation to based your purchase figures on, however for parks we have to know our markets before we buy anything. 

For mathematical sake let's say the tax at this level is 20%.

The ROI on my degree clocks in at -$152,633.My brother's BS is from Carnegie Mellon University, in Computer Science/Mathematics.

Like it's a mathematical equation and you just have to get it right once and ABSOLUTELY IT WILL WORK EVERY TIME.Buy and hold real estate is one of the few ways an average person can actually live out the American dream still.