Do I need a Moca adapter?

Hi all!

Thinking about leaving Dish to get a Comcast double play and save money. I would need to buy the refurb Romaio and two minis. The modem and router is in my master closet. Romain would be in the theater room with Ethernet connected to the router. One mini in the family room downstairs with Ethernet. Other mini in master bedroom with no Ethernet. Would I need to purchase a Moca adapter for the bedroom?

Thanks!
Quinn