Although each unit is it’s separate dwelling unit, but you can only do one sec 121 exclusion every two years, doing two simultaneously is not going to happen.  

One thing I can say is that despite all of the troubles the city has, it simultaneously is in the process of revitalization, with many new developments downtown, and large companies (especially tech companies) relocating to Detroit.

Federal, State, and Local Government....so that existing homes in bad condition will not adversely affect property values of newly rehabbed and newly built homes, while simultaneously making the existing residents part of the growth of their community.Also there should be measures put in place to protect existing residents who cannot afford increases in property taxes, such as the establishment of Community Land trust.REVITALIZATION DOES NOT EQUAL GENTRIFICATION.

@Samuel Brian McKenzie It sounds like the listing agent is trying to avoid being a dual agent (representing both sides simultaneously). 

I would issue the new lease with the restrictions of no public area privileges and a major rent hike, simultaneous with the notice to cease and my letter asking them to leave.

Generally, your tax pro will need to provide the buyer with a "Declaration and Notice to Complete an Exchange" and the exchange must be simultaneous (i.e. same day).Your tax pro can walk you through all the steps you'll need to take to be compliant. 

 You cant move forward with an FHA loan application with multiple lenders simultaneously.

To do that you are acting as the qualified intermediary for a simultaneous 1031 exchange. 

If you are marketing to multiple listings or properties simultaneously I would recommend sending out direct mail.

If I am looking to do several simultaneously, I'd leverage the LOC by using HM as well.