Be very very careful of discussing specific pricing parameters with other financial institutions as that is generally prohibited.
With respect to the risk of third party checks, many institutions require a pledge of collateral, such as a Time Deposit, to cover the endorsement failure risk. The requirement is that the account must be maintained at least a year to three years after the last 3rd party check is deposited.
With respect to a monthly service fee, you really need to take a look at the expense the bank will incur for the additional monitoring, due diligence work, etc. and charge accordingly.
Regulations are a poor substitute for ethics.