I understand they service builders/flippers by advising them on what's best for their investment and managing the selling process.

At over 4000 sq ft, I'm surprised you won't be able to list for a much higher number to net a decent profit, but without knowing more specifics on the house and location, I am speculating here. 

A bonus is if that company also manages and will stand behind that property after the sale to an investor like you.if you have the time, desire, risk tolerance, and knowledge, you can absolutely find and or create deals on your own.  

Hello,I bought a duplex in Pensacola $75,000 under appraised value, in an amazing location.

You would have to self-manage though, as paying a property manager will eat up most of your profits.

You can also write off expenses such as property management, insurance, repairs, etc.

The clients we work with who have found success letting us help them find highest and best use of properties, then we manage them for a year, and then pull out 60-70% of their money, and do it again - rather than waiting several years for a home run hit. 

I have 3 homes managed by a property manager.

If you are going to start BRRRRing in Philly assemble a team of real estate professionals who can help you with market analysis, location, title and financing.

The key is making sure you have the right team in place—outside of market research, finding a trustworthy property management company is one of the most important factors in making long-distance investing successful.