I bought a rolling fold up box thing from Staples, on sale for 19.95. It comes with pockets on all 4 sides and has low center of gravity(sits close to ground) dosent tip over easy. Machine fits in it and room for extras around the machine, like fabric, thread and such. Will see if they still sell it and post pic if I can find it.
http://www.amazon.com/Cutting-Edge-U.../dp/B0013PW6P8