Need Some Help Calculating Voltage Drop For a 220 Foot Run With Multiple Branches Off

I am trying to do the math as far as voltage drop. I am trying to control about 12 strikes all from the same relay (all will be locked or unlocked at the same time). The strikes are all on doors that are along a hallway that is about 220 feet long. The plan is to run one main wire down the hallway, and branch off by each door. Is an 18/2 wire a thick enough gauge for the main wire? I would have a 22/2 going for each branch?

I can use 12vdc or 24vac. Would one work better?

Thank you

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