Referencing actors in multiple BP: performance / memory issue? (simple diagram provided)

Thank you for your answer. It’s a relief, then. I was a bit unsecured about making a lot of those arrays. Like an array for all the military buildings, another one for storage buildings, another one for production buildings (and now I can make a structure with all of them), and then why not more arrays for new types of units, etc.
It’ll be way easier and handful to use.

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