Depends what you're doing and what your needs are. If we have one big database sitting in a data center and it would be beneficial to setup a read replica for other workloads, suddenly that's a $150,000 suggestion instead of a "We have this server over here".
Want a couple? $300,000.
Big client that you'd like to isolate on their own hardware? $$$$
Want a couple? $300,000.
Big client that you'd like to isolate on their own hardware? $$$$