Sonos:1; cheapest compatible speaker?

[RLDreams (Really Living the Dream)]

There is always the Kindle fire.
Thread on setting it to run SmartTiles, and Tasker. Installing google

$42 kindle fires

These things are becoming stupid cheap - With a nice mounting solution it wouldn’t be unreasonable to slap one of these up in every room. http://mashable.com/2015/09/17/amazon-fire-tablet/#_VECt3NHhGkH