Hi,
There's a new sous vide appliance on the market for home use called 'Sansaire'. It was kickstarter-funded. I believe I first saw this in a recent F&W or Saveur issue. In theory, this looks like it could work quite well and it's very affordable. However, I do not own one and I've never physically seen one in use so I have no idea if this product performs well or not.
NOTE: I'm not affiliated with the company in any way; this is not an endorsement or recommendation.