Is there any cheaper alternative to setting up queued verifiers instead of individual aws instances?

Is there any cheaper alternative to setting up queued verifiers instead of individual aws instances?

(from ez#3296 on discord)

Yes, there are a multitude of VPS Providers on the market.
Popular and competitively priced ones include Ramnode, Hetzner & Vultr.

does it have to be KVM based?

Any virtualization environment will work for running Linux based containers, KVM specifically is not mandatory.