Homesteading a multi family

[Lisa Wright]

Hey I am researching the house my sister is renting. She has one of 6 units.  They did an odd lease renewal so I'm suspecting it might go up for sale.  

If she lived there and I moved in to a unit, would we be able to homestead, or not pay the rental tax rates?   Based on the area it would jump up substantially with a sale.

Just pondering and considering reaching out to the owner.  He has owned it for 20 years.  

Thank you!