You need an experienced developer who can "expedite" the process.You said it is already zoned,are you sure?
What would your project be classified for residential,mixed use,commercial,etc.?
You need a site development plan,drainage plan,ingress and egress plan,traffic signal plan,signage plan, and a landscaping plan that needs to be reviewed and approved by all governing authorites having jurisdiction over the subject real estate.
You need to conduct and environmental audit of the subject real estate to make sure it is free and clear of any and all hazardous,toxic,asbestos,pcb's,or regulated chemicals or substances.
You might also get hit with high impact fees.
Too much to list here,don't take this one on by yourself.Screwing up and learning as you go will eat most of the profit and timeline developing this land.
good luck