[cj]

> If the SaaS target customers are smaller companies / startups, then this may be viable

I’m your target audience.

The #1 issue I have with this concept is, as a customer, I would have to trust that you understand the performance limits of my production database and that you won’t run (even accidentally) a burst of inefficient queries that takes down or impairs production.

One way around this would be to query against a replica / secondary, but even then you risk overloading a secondary/replica, which could have negative effects in a failover scenario.