Commercial / Single Unit Office Space Analysis

[Andrew Hamlett]

So I'm drawing up an excel sheet to analyze office space to potentially purchase.  This would be single tenant office space I'm trying to compare with current office space, single tenant. I'm essentially looking at monthly rent with annual escalators vs what the new property would cost to purchase, rent, etc.. This would also include operating expenses, of which there are many. I believe I have everything, data wise, I need to compare that but curious if anyone had any models they've made via excel or other systems that they could share. Just looking at a deeper analysis and hate to completely recreate the wheel that I know others already have done. 

Many thanks in advance!