And then you bring them back the next day

No.

He only said «for a day»

I have the power to resurrect people, but I don't want to.

Bro's gonna be Bat Man for more than a day💀

Does this individual have the resources to fulfill the rest of this dream, such as a Batcave, a Batsuit, and a Batmobile?

You might enjoy this documentary:

https://www.amazon.com/Batkid-Begins-Miles-Scott/dp/B014K5F0QO