You can flash our operating system Hass.io[1] to a Raspberry Pi, install an MQTT broker and Snips via the Hass.io UI, connect a microphone and speaker to the Pi, upload your Snips assistant and you should be good to go. See the instructions [2]

[1]: https://www.home-assistant.io/hassio/ [2]: https://www.home-assistant.io/addons/snips/