I think once Parker Industries crashes and burns, Peter should become a freelance inventor. Peter was at his happiest when he was creating gadgets for Horizon Labs. For the writers who think Peter should always struggle should note that with Horizon gone, being an inventor will not be so lucrative for Peter. It is a way for Peter to remain a scientist and still have money problems.
Well since his reputation as a photographer is wrecked, this could be a good thing.
Or he could risk working for Tony Stark again......