How to run many current Ray Tune runs without taxing head node

In our organization, people want to run up to 20 Tune runs concurrently, but each Tune run client connection uses 0.5-1 gb of ram on the head node. Is there any way to scale this up besides paying for a larger instance head node?

are you using Ray client?
can you try Ray jobs instead? Ray Jobs Overview — Ray 2.4.0