That will quickly come to light in court. 

I wouldn't flinch, let them push this to court and then evict if necessary.

Check out the condo docs and find out how the price he's willing to sell it for compares with recent sales in the complex.

Is the current court backlog in getting FC done a factor?  

Stick with it, I'm not sure how not being a US citizen complicates investing in the states but I'm assuming it adds another layer of complexity, there is money to be made in the 'land of milk and honey'! 

It may not move very fast since there is lot of inventory sitting in your complex so price, condition and marketing will be key.

So the daughter went to court and fought for her father with his GAL.

I bought a duplex and the seller had a signed agreement from the tenant that he was going to move out a few days after the sale, Do I still need to Evict Thur court?

Ok so it's always been my dream to buy an apartment complex.

If he doesn't pay rent in full let him know he'll be evicted as soon as courts allow.