PiperWallet is basically the same thing, except it's nicely packaged in a plug-and-play product.

The list price for Raspberry Pi is $35, the price for the thermal printer like the PiperWallet is $50.  So the total is more like $85, plus you will also need:

• A HDMI monitor
• A HDMI cable
• A USB keyboard
• A USB mouse
• A power supply (PiperWallet includes this)
• A case (PiperWallet includes this)
• Archival quality thermal paper (PiperWallet comes with 4 rolls)

If you're going to DIY, one thing to avoid is eBay power supplies; fake 5V 2A USB chargers are rampant on eBay, and they will not work with the raspi.  Sparkfun has quality power supplies that will work (https://www.sparkfun.com/products/12890).

CampBX is throwing up some red flags lately.  A few months ago things were going smoothly and deposits (both MO and personal check) were pretty much on time, but something has changed.  I've got a $1K deposit pending that's over a week past normal now.  I expect when they get around to it that it'll be deposited, but not being able to keep up with their basic business functions is very troubling.  So I've pulled out all my BTC out of CampBX for now and will be watching my checking account closely to see if/when my deposit makes it into my CampBX account.  Hopefully the CampBX folks won't get so frustrated with unhappy customers (not to mention federal regulators) that they just say screw it and walk away; I like CampBX and hope they succeed.