Pools problems at foreclosed/vacant houses ?

[Amie D.]

If a house has been vacant for a while with a drained pool, what are some common issues you have and about how much would they cost to fix?

Just trying to figure what probable costs to account for in a bid with a vacant (sometimes for years) empty pool. 

Pools are not as common where I’ve moved from however in Tucson/El Paso many foreclosures/distressed properties have pools.

Thanks!