You are right, it is a good thing to check everything before you leave? Do you have any confirmation about the 14 days of parking?
Did you check parksleepfly.com? There is a parking option of a minimum of 14 daus. In addition to the Ramada, there is a Microtel with complimentary airport shuttle. For 14 days of parking and a room the night prior to your flight it is $149.99. Just the parking alone would be that much if you parked at the airport itself.
I checked biddingfortravel.com and priceline bids of $50 have been accepted for Philadelphia airport hotels including the Marriott, Hilton, and Renaissance. If you decide to go this route, you could call the hotels prior to bidding for travel to make sure they will accept the 14 days of parking.
Good Luck.