You could use a standardised software like with a raspberry pi to provide entertainment and more: http://imgur.com/a/9Xpil
With Chinese sourcing, it could be possible to drive down the components cost even more (e.g. http://www.aliexpress.com/category/34/automobiles-motorcycle...). Obviously you need to be careful about quality, but bulk buying for a reliable supplier would really help drive down costs. You won't get the fanciest latest-gen stuff, but it would get the job done for simpler components like knobs and switches.
You could use a standardised software like with a raspberry pi to provide entertainment and more: http://imgur.com/a/9Xpil
With Chinese sourcing, it could be possible to drive down the components cost even more (e.g. http://www.aliexpress.com/category/34/automobiles-motorcycle...). Obviously you need to be careful about quality, but bulk buying for a reliable supplier would really help drive down costs. You won't get the fanciest latest-gen stuff, but it would get the job done for simpler components like knobs and switches.