Install front license plate bracket myself, or at dealership? Cost difference?

I know it'll be cheaper to install it myself, but I'm afraid to damage the front bumper since I have to drill holes to attach the bracket. If a dealership does it they'll know exactly how to do it since they do it all the time.

It's Honda that I'd be dealing with. I know they're expensive, but would a bracket installation really be that bad through them?

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