Is this deal cutting it way too close?

[Corey Woodruff]

This is going to be a subject to deal. It is closer than I usually would even consider but since I dont have to get my own financing I am considering it. They only have 10 years left on the note and then I will own it free in clear. So my motivation is that in ten years it will cash flow greatly! 

what do you guys think ??

https://docs.google.com/spreadsheets/d/1AVoICWBDjs...

follow that link i have all the info you would need to tell me what you think, am i missing anything