It might have been mentioned, but you only need those 250 hrs to get your ATP out of the way. Don't know where your connections are at, but if they're at CAL you might have a little bit of luck getting in w/o turbine PIC or waiting around for upgrade. A guy i know explained that they had several individuals who were never captains in his recent CAL class, while it wasn't the "majority" it also wasn't a rarity to see. If you're looking at places that require the 1000 TPIC, well...you'll either have to get that time, or wait for the mins to change.
you could jump ship to a regional that has a quick upgrade, probably one of the smaller turboprop operators out there, and try to get your time that way. But on reserve, it'll take you quite some time to get some more PIC, (as you probalby know) on the other hand...you could try to get enough PIC to get over your 500 hrs PIC, and 500 hrs SIC issues.
And no, the FAA says you have the 500 hrs of PIC, just the other airlines might not.