They say that you can build one for $13.
https://www.home-assistant.io/voice_control/thirteen-usd-voice-remote/
They also have on their roadmap that they’re working to see if they can build or engineer out or whatever an all in one, easy to set up voice satellite hardware as one of their next up priorities.
https://www.home-assistant.io/blog/2024/06/12/roadmap-2024h1/
For total clarity, I’ve never used Porkbun so I can’t vouch. But I like what I see on their website.