For ADUs, consider the additional assessed property tax, and of course the initial upfront and holding costs.

We need upfront investment to start new active business at where we will be moving.

i would think finding a mentor, slightly out of the area may be a good move, so that you actually don't compete with each other but can actively and whole-heatedly bounce ideas off each other as well.

. // Isi Nau's assessment is a good -- it's up to you, the lifestyle you're willing to do and your tax situation.

I think the sweet spot is 4-5 bedrooms, 3-4 bathrooms, a fabulous Master Sweet (since they are likely footing the bill), sleeps 12 - 20, tons of activities (installed a pool table, corn hole game, etc...), and in my location of AZ a pool. 

Look for multiple owners who are actively buying.

It is calculated by assessed value times mil levy (tax rate).

There is extensive  damage in the apartment  that exceeds the  deposit  and your apartment  is still  being  assessed. 

My wife and I are actively working toward this.

There is a lot of great information here on BP on the topic and many professionals in the field who are active contributors.