Update: I've previously asked a question about how to use clay effective and as cheap as possible, my current solution:
Several google accounts to get multiple free CLAY trials (3 accounts = 3 months) & i already had 4 accounts so easy to do.
Several google accounts to get multiple free SERPERDEV trials (2.5k free credits per account!!)
Buying 50$ plan @ findylead (5k email enrichment + 5k verifications)
+ i'm using instantly Hypergrowth plan (don't cheap out on that one) (90$ish)
+ i'm using SMTP plan at Scaledmail (50$ish)
Keep the grind on everybodyyy!