OK, it is a condo that they want to sell.
She has been staying there for several years.
She is a reasonable tenant that does not trash her home and pays consistently.
Mature adult with grown kids, no booze, no drugs, no stupid.
I can't help much with a Thai lease, I know some people that might be able to help there though.
She has an opportunity to occupy a smaller unit in the building but it is not the unit she rented.