I just went through this process in Nashville for 2 short term rentals (actual government distinction).

In both cases they are wanting two distinct and separately funded transactions (a "back-to-back" closing) to clearly avoid the use of the end-buyers funds being used to pay the original seller. 

So is the distinction between upgrades and repairs that several others have mentioned.  

Is there any distinct advantage to using a sequential mailing (i.e. the Month-1 postcards looks like/says this, the month-2 cards say that, the third month is a letter, etc) or can i send the same mailer every time?

We all have skills, dreams, goals, and personality types that bring distinct advantages to your ability to be a success.

Mildew also has a very distinct musty smell.

I don't feel the current tenants are using the space to its potential/set-up and currently, there is an elderly scent as well.

That’s an important distinction to make.

Massachusetts does make a distinction between fixed term and long term leases.

Commercial properties may have different zoning, tax, and regulatory requirements than single-family homes, making them distinct from residential properties in terms of classification and usage.Hope this helps.Good luck.