Sorry @AChapin
I just ran a test in one of our HubSpot Portals and some of the [most useful] functionality is available for Sales Pro users NOT Service Pro Users.
You still have all of the Properties, and the Target Accounts Dashboard, but there are some features that need the Sales pro license to set Stakeholders and Roles.
If you turn on ABM you can’t turn it off again.
Happy to do a screen share if you want to see the features.
Mike