Negoiations and seller requests NOT to prorate rent

[Jaquita Perkins]

Hey Bp folks.  I'm trying to negotiate my first deal on a mobile home park and have made offers and several counters, and now we are getting close, about 20k off on $270k deal, but now the seller lists to NOT prorate the rents.  I am willing to go up to 260 or even maybe the 270 but not sure what to do about not prorating.  Is this something I can't tolerate?  Closing to be on 19th. I will surely appreciate any advice you guys have.

Thank you.