Even though the BSA exam technically falls under Compliance
For 10 years my BSA Exams have always fallen under Safety & Soundness. I'm always seperate from Compliance.
We're $950M 4 branches. Our Risk Dept. consists of 1 CO w/2 assistants, I'm BSA with 2 assistants, and one Internal Auditor.
As Randy suggested - these numbers are hard to gauge. I may have 2 assistants - but what is my risk profile? do I have any BSA issues?
I would find comparable institutions in your area & really dig into similarities. If a small bank has a sophisticated foreign customer base, their BSA needs will be completely different than a larger bank with a vanilla profile. In NorCal we (BSA Officers) created a roundtable to discuss these very things. It's been very helpful.