Here's a Hotel that I found in Philadelphia that's reasonably priced and close to the Historic sites:
Wyndham Philadelphia At Franklin Plaza 17Th And Race Street Philadelphia, PA 19103 $119 per night. Shula's Steak House - On-Site Terrace Restaurant - On Site Cocktail Atrium Lobby Lounge/evening Shula's No Name Lounge In Room High Speed Internet Computer Business Center or cybercafe