So, I can't remember what my excuse was, but I terminated the tenant's tenancy at some point to avoid legal problems.My point is; some people breathe out excessive and unbelievable amounts of moisture.

It is only $60 and avoids negative back and fourth that is just a waste of time and energy.

@Bruce Woodruff tactful ways in doing so to avoid him damaging the place further?

I had underestimated how much of both I would need starting out, and TBH had I known I probably would have avoided going this route. 

Trying to avoid this type of surprise going forward so just want to know how everyone else is doing their analysis.

I want to make an offer on this property but want to avoid the headache of an appraiser saying that the third unit must be completed before sale.

On the Seller Financing you could present it as a way for the Seller to avoid paying capital gains as a result of a sudden financial windfall from the sale but instead getting a healthy downpayment and a monthly payment with an interest rate that is doable for you but attractive to them. 

Meaning if I buy or sell my own property, how many times can I avoid paying a commission? 

I would not avoid looking on those sites if I were you. 

Paying them is worth avoiding a major headache like this.