Can I get a second opinion on this rental property analysis?

[Brad Chatman]

Hi All,

I'm working with a house flipper/property manager and considering buying some of his properties.  in his pro forma he shows this property at a 20.87% cash on cash return based on his assumptions; however, when I run mine I'm getting 7.91%.  

We are differing on the utilities, maintenance, capital expenditures, and vacancy rate.  

This is a newly renovated property. 

Can you have a look at both of these worksheets and let me know if you believe any of these assumptions are off from a general rule of thumb point of view.  I just started researching real estate investments about two weeks ago so my numbers could easily be off.  

Any help on this would be appreciated.  

Thx!

Flipper/property manager anlysis

My analysis