First Flip. How important is a general contractor?

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About close on my first house, was a hoarder house and going to need a lot of work. I want to hire a general contractor, I feel a good GC would help speed up the flip which would limit holding cost and help get a good estimate. My partner would like to self manage the flip and work directly with subcontractors thinking the GC takes too much money off the top. Is it worth it to save the headaches? Does anyone have experience in self managing a flip? Would love to hear your perspective.