If it were totally up to me, I'd offer to let you stay at my place. But I'd have to ask my girlfriend, and I'll be honest, it'll likely be a hard sell given that we don't know eachother personally.
I can also ask a few ppl in the area if anyone has an extra room or couch space for a few days. I don't know how successfull I'll be, but I sure can ask for you.
Driving into center city philly every day to get to the convention center will be a real problem for you, I wont lie. Lived there all my life. Street parking is very rare around that area. And if you do get lucky with a space, the parking authority in the city is a racketeering business that will nail you every chance it can with most streets having low park times even on the weekends (and certainly will limit them further with a large convention). Finding the good side streets with free parking within few blocks walking distance can be very tedious, and parrellel parking on super narrow streets is hard if you are not used to it. There are parking garages around for sure, but expect NYC type rates (we are talking 30-45 bucks a day)
Luckily though, the main subway/train station runs right through the convention center. Some good advice would be to stay somewhere just outside of the city and use the SEPTA lines to get to and from the convention center. You have lower hotel costs outside of the city, and 5 bucks to ride the train to the convention center isn't terrible (better than the cab or uber fair you'd pay). I just moved right outside of the city last year, and I certainly will be taking the train in.
If anyone has questions about the area or the public trans options, feel free to ask them here or PM me.