The last thing is you must use all of the net proceeds in your exchange.

I had made a reply to a similar thread on this.

Regarding leverage - use it carefully!

Quote from @Ritesh Keskar: Just found this old discussion thread.

Quote from @Kmsuea Abdei: This used to be a state requirement, some states required it, and some brokerages required it.

And you must use all of your net proceeds in the purchases.The opportunity for you is that you can allocate the cash from your sale anyway you want. 

A contact of mine has been thriving with STR investments in suburban Chicago, targeting guests visiting for conferences.

This is one of the biggest insulation issues second only to the attic.

For most, this isn't a realistic option so they update some of the most important regions themselves and copy the data from other providers where they don't have coverage.This is a big problem with these big consumer-grade real estate analytics platforms—you don't really know the source of that data, its frequency, etc.

Quote from @Jonathan Chan: I used my Mom's to help her retire by becoming a lender on real estate projects, but curious to see how others are leveraging their SDIRA.