That's a dangerous strategy, and one most would advise against.

I usually advise folks moving to a new area to rent for awhile to get the lay of the land.

Great advise @Remington Lyman! 

There are a high number of CPA firms that do not want to get involved outside of the FYI to their clients, and some state boards are saying that a CPA advising related to this registration is an "unlicensed practice of law" given it is not under Title 26 - income taxes - the only place where CPAs and EAs are specifically authorized to interpret law. 

Any advise?

I would advise picking one of those strategies and rolling with it.

Also, most of us would advise against arbitrage.

To make it even worse, my attorney has advised that the 90 days has to be three full calendar months (in his interpretation) - meaning that the 90 days starts from the 1st of the month following your notice to them.

Based on my experience coaching investors with my husband, who was a realtor many years ago, I strongly advise that, regardless of whom you work with, you meet the team, conduct thorough market research, get an appraisal, schedule an inspection, and also arrange for a site visit.

Minus re-zoning expenses- Any advise for this transition into low income/transitional housing?