If this tenant was able to make a 12 month commitment in the first place, it doesn't seem unreasonable to expect the same upon renewal. 

We negotiated hard for two weeks and then the seller became unreasonable. 

Sometimes it takes lower offers to get unreasonable sellers to understand the value of their home but it isn't always the case.

Not sure if it’s an unreasonable expectation, but I’d like to speak with the owner before applying for their services. 

Now, many sellers are and will be totally unreasonable, so you have to get ready for them to be stupid when it comes to needing the zone change in place by you for you to close.You are the developer, you have to be more disciplined then the sellers, it's not their risk if you close now, and the zone change fails.

Sending notarized signatures that the loan has been paid off and originals of the loan documents before being paid back sounds a like an unreasonable expectation. 

That was what I thought but Im always trying to make sure Im not being unreasonable with these guys.  

That does not seem unreasonable, what areas are you looking in?

That'd be three people and prohibited by your occupancy rule of 2 people max, but that's not an unreasonable number of people to rent your unit and it'd likely be considered a fair housing violation. 

Would it be unreasonable or illegal to charge my tenant the difference between the two treatments since she didn't notify me?