I would also try to build in as many self-service features that you can so that you are not bugged with routine maintenance requests such as adding master data.

I would also try to build in as many self-service features that you can so that you are not bugged with routine maintenance requests such as adding master data. Otherwise, all maintenance requests should be done for a fee. Customers also value you even higher if you proactively do maintenance such as security fixes that maybe beyond their capabilities.