Hey I'll make no comment on the numbers, but the situation...
My first deal was a fully occupied duplex. In hindsight, I wish I had done more diligent screening of the current tenants and the situation beforehand, or otherwise negotiated the deal as the seller emptying the units ahead of time.
My plan was to complete the cosmetic renovations on the incoming cashflow in 1-3 years. "Hey, there are tenants in place who are perfectly happy living in the place as-is paying what they pay and the cashflow is there on paper."
Long story short, it was the tenants that the seller was looking to get rid of more than the property. The property was solid, just dirty. The problem is I stressed myself out the first 4 months chasing the tenants for rent that was usually 3 weeks late and sometimes 5. They were non-cooperative and I ended up evicting them both, one at a time, and performing the renovations (and paying lawyers fees) out of my pocket, not the imagined cashflow..
The reality of my situation was, the guy I bought the property from owned it free & clear, and was happy to collect the rent most of the time as long as he didnt have to do too many repairs.. Nothing major was amiss, but it was not what I had planned for and it was a great learning experience for me.
At this point, I am glad to have my renovated units back and it cashflows well with my current tenants. The place is neat, clean, and updated as needed now - but it ended up costing me quite a bit out of my pocket that I did not plan for. I am basically behind by about 2 years on my original plan as my profit was destroyed and any hope of picking up another rental were temporarily dashed because I had to do 2 evictions and 2 turnovers of filthy apartments that I thought could be handled by cashflow in the bank.
I would suggest asking for bank statements or pages of tax returns that illustrate the actual property profit/loss and actual rents paid. I also followed advice found here and had the current tenants and current owner sign estoppel agreements that detailed all of their understandings of the current agreement, which headed off some other problems that we could have had..
No legal advice here, just my experience and hindsight.