whats involved, gas station/store?

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I'm researching the process to develop a parcel of uncleared land to build a convenience store/gas station. the land is currently zoned AGR and there are about 150 homes north of the area. they have a minimum 15-20 minute commute to any type of store or gas station and the opposite of the street from this parcel is still vacant but zoned PUD.

so what is all involved in the process to get something like this going?