How to move a lot of actors with out using too much processing?

Did you try parenting those objects to one? as you move the main object, all children should move with it.

I have a tile game I am doing where the tiles spawn and move to the bottom of the screen. This is all done via event tick and works alright until I get a bunch of tiles on the screen it starts to chop a little bit. My question is, would using a timeline to move the tile to a specified point be a better way of doing it to reduce resource cost?
I will be moving upwards of 50 tiles on the screen at one time and they should be able to smoothly reach the destination. But it seems like the more tiles I have and the longer it goes on it starts slowing down. Any ideas?

All of the tiles are spawned separately so they will all need to be independent.