What are the 1031 Exchange Timelines?
There are two:

The Identification Period – You must identify a selection of other replacement properties that you wish to buy. This period is exactly 45 days from the day that you sell the property; no exceptions.
The Exchange Period – This period ends exactly 180 days after the date that you close on the sale of the home (or is the due date that your federal tax return for the year in which the transfer of the property has occurred, whichever situation is earlier). This is the time period you have to finalize your new purchase transaction.
Please note that while none of these time frames are negotiable, it is a very clear cut process that can save you an extraordinary amount of money and even adds more appeal to this buyers’ market.

What I’m trying to say is: if you’re a buyer and have found a home you love or you’re a seller and have found a buyer that is qualified – you should try to work it out with both parties under the expertise of your realtors and the lender. Emotions get in the way too often.