The main criteria to evaluate this is when did you complete the start-up phase and became actively engaged in business?

In FL flood is typically the main cause along the coast.

. - The ultimate house hack, live in the small ADU unit and rent out the two levels of the main house on AirBnb in San Francisco (I would have thought STRs are oversaturated in S.F. but it worked for them and they stay fully booked).

So that's your first major hurdle.

This property had a main house, a pool house, an apartment over the 3-car garage, plus a 1,200 SF guest home.

There are two main ways to utilize this exemption.

Thank you Brett, mainly for properly reading my inquiry and genuinely trying to help me.

Most (virtually all) are giving values below the main ppsf. 

The main Real Estate one, On The Market, and BP Money are some of my favorites, but I also listen to the Rookie show when the topics are interesting. 

Main thing I would think of if you are targeting families are things like pack and plays, cribs, gamerooms for kids, etc. as well.