Ok I'll shoot from the hip on this one since its sight unseen. Being from WNY I have firsthand experience what winter does to water features. Seeing as how it has been neglected for years in all likelihood their isn't much that can be saved. 5-6k is not bad for a water feature that size especially if all the the mechanicals and electric have to be replaced. I will agree 10 days does sound kind of ultimatum-ish.