@Bryce Liggins - If you want to get an offer in by September 15th you'll need to get your financing squared away pretty quickly. I have a lender who works fast, I can give you his info if you send me a direct message, he can get you pre-approved quickly. If you want to put less than 5% down, you'll likely be going with an FHA loan. You can also build a rehab budget into your loan with a 203K along with the FHA loan if you want, with as low as 3.5% down. I can't really speak to the private lending scene as I don't have experience with that, but it's not a bad idea to keep researching that avenue.
One thing I would be careful about "riding the increase in home values in Philadelphia". I'm not sure if I would bank on appreciation too much in Philadelphia right now. Prices are as high as they have ever been in Philly right now, and it's risky to buy under the assumption that home values will continue to increase over the next 3 to 5 years