I Need a 2' wide bed CNC mill

Okay, I can justify such a beast from either cost, space, or power basis.  Trying to accurately measure and drill 24" long pieces of aluminum is harder than it looks with a 24" ruler.  I am redesigning to make the needed thick parts (where I will be mounting the casters) 4" wide, One on each end (perhaps adding one in the middle if needed for support..  This is what it looks like now.

Please don't laugh at my clumsy attempt to do CAD with OpenOffice Draw.  Every time I try to lean one of the open source CAD packages, I am reminded of what the stroke took away.