What is the best way to animate a bunch of ballons pinned to the ground? (2.82)

Hello, I’m trying to animate a bunch of baloons pinned to the ground.
So far my simulation is made of a spheric cloth simulation (baloon), attached to a soft cloth simulation (string) which is a line of vertex with skin modifier.
The string ground end is attached to an empty with a hook modifier and the other end is loose.
The ballon has a copy location modifier which makes its base to follow the loose end location of the string.
The problem is that when I make copies of the balloons, they intersect to each other… my guess is that the copy location parameter is the culprit.

I’m attaching the blend file, I’d like to have some insights about making it work properly, thanks!