It should not add any costs except the storage for the takeout zip on drive.
Look at supported providers in rclone and you might find easy solutions for some hard sync problems: https://rclone.org/#providers
Yeah, that's the cost I'm talking about. It essentially amounts to paying an extra subscription to be able to download your data [on a regular basis].
I'm a big rclone fan btw :) I'm sure there's some future where we do something like this to automate Takeouts.