a) Enterprises have almost entirely moved away from self-hosting software. GCP Marketplace is fine but I would probably also look at a Kubernetes option as many companies have GKE clusters.

b) It won't be 5x faster though and I wrongly recommend you don't take a marketing attitude when selling this type of software. Because it will be mostly technical engineers and architects deciding on this and we aren't stupid. I have run GPU accelerated Spark clusters for years for enterprise companies and you will be able to accelerate the query part of the pipeline but that's like 20% of what a typical job does.