From the date of the closing of your sale you have 45 days to identify your potential replacements and 180 days to close on one or more of those properties and complete the process.However, it sounds like this is your primary residence so it would not be eligible for 1031 treatment anyway.  1031 exchanges are only for investment property.  

Math cant discriminate.Attached is a visual of the equation I mentioned (click on it to enlarge).

This is the prescription phase, where you show the Seller that your service is the best available treatment, taking all the factors of the Seller’s situation into consideration for their pain.

@Shetal Gandhias a programmer, you are likely ahead of most REI folks in terms of what you can do with data.mash yourself a simple geodatabase from redfin csv's or assessor shapefiles. get up on qgis (20 minutes) and make some visual databases for your programmer self.

You would think that we would start having these discussions sooner than closing day, but we have a tough time visualizing everything until we're walking through it with no tenant, no furniture, no agent hovering and the ability to really take our time and just hang out in the place for a couple hours.The way I handle it is this.  

Generally i am a visual person so the scenerios are so appreciated.

They also provide documentation on property, visually, rather than search through the accounting records.

Consider waste treatment: are you running sewer lines?

I too like you guys have found much of the same kind of treatment.

If she leaves, then all her belongings will leave with her and you can do the heat treatment which is done in one day (but is MUCH more expensive).