How much should I drop on chase Edmonds?

I currently have Eckler, Lindsay, Montgomery, and Damien Williams.
I’m not really happy with these at the moment and was looking to maybe trade d hop away to get an rb1 but chase Edmonds is on waivers.

What are the chances Edmonds can become an rb1 and how much fab should I drop on him?

It’s a 10 team 1/2 ppr with a receiving only flex.

Thanks everyone!