Yes, they can be purchased, but you'll still incur the same monthly fees. That fee is $7 per month per Joey. If you want 4, you'll need another Hopper. I believe 3 is the limit per Hopper.
how can you avoid a monthly fee for the Joey's? I have a TV in a guest room that is used maybe once a month. I cant justify paying $7 per month for a Joey. Any other options to get service in this room? I dont need all the bells and whistles - just live TV.
If you buy a Joey you can activate it and deactivate it when needed (keeps from having to send it back), you should only get prorated charges for the time it is active.