Our accounting firm charges us $100/month per entity.

Signing up as an accountant (no need to verify) got us a big discount of their plans. We pay $15 CAD for their Essential Plan (currently listed on their site for $35 CAD).

We are paying $150 per month for QuickBooks Online Advanced. We have two users and fit cleanly in the Pro tier until they added the new limits on the number of accounts in the chart of Accounts.