Has anyone purchased buy/sell life insurance?

I'm in the very early process of trying to determine terms and coverage amount.

I want a large enough policy so that I don't have to refine the amount and be subject to a health audit as our companies continue to grow. But I want to balance that with price (e.g. I'm not willing to pay $15K/year for a $10M policy for 15 years).

I'd appreciate any insights or experience the community can share so that I can better frame my expectations and delineate between our wants vs needs.

Many thanks in advance.