I always wanted a portable machine for parties and things of that nature.
The mammoth pedestal I have at home is movable but not without a pickup and a drinking buddy to help load it.
This is kinda what I was thinking about doing. Probably not going to make it battery operated tho.

I pulled that from ZAGG at
http://www.instructables.com/id/Portable-Raspberry-Pi-Emulation-Machine/So far I got a basic parts list. All found on Amazon.
Winstar USB3.0 4 port hub+1 Charging port With 12V/2A Power Adapter ------------------$9.97
URBEST®Inlet Module Plug Fuse Switch-------------------------------------------------------------$5.99
E-Goal 12V 5A 60W DC Switch Power Supply-------------------------------------------------------$9.99
Tontec® 10 Inches High Resolution 1280x800 Raspberry Pi Screen Display-----------------$78.98
Pelican 1200 Case with Foam for Camera (Black)--------------------------------------------------$34.05
Buffalo Classic USB Gamepad for PC------------------------------------------------------------------$12.48
CanaKit Raspberry Pi B+ Complete Starter Kit------------------------------------------------------$54.95