@danielbrown8998
Not sure if small business can afford SDWAN and there will no SDWAN for small business devices. Maybe Cisco Meraki could be, it will depend on the budged of course.
Now, how SDWAN scale is simple. It uses a central controller that manages all the devices part of the SDWAN topology. If you add a new site to the topology, you just need to add a new router, the router will be provisioned and managed by the SDWAN controller.