5-Axis help

Hello all. I am interested in building a 5 axis router mill like the
one here: http://www.ctek-on-line.com/5axisgm2.html. Of course the
one I have in mind is much smaller.
A little back ground; I am a beginner industrial designer and know
that some of the big companies have their prototypes built in these
big machines. Most of the work that I do can easily be done on a
smaller 5-axis gantry mill. I would like to mill something in a 2'-
3' cube area. Has anyone attempted to build anything like this? Is
it feasible? I'm a bit lucky that I can get an aluminum frame built
for next to nothing but my main problem is the drivers to run the
stepper motors. The 5-axis drivers are considerably more expensive
than their 3-axis siblings. Why? I have no knowledge of electronics
so I can't design a driver myself. I've noticed tons of home built 3-
axis drivers on the web but can't seem to find any 5-axis drivers.
Has anyone on this discussion board built a driver for this type of
application? If so, are you willing to help a struggling student? :)
Am I in over my head? Although I'm not very knowledgeable with
electronics, I am very technical and don't get discouraged easily. I
have been researching this for about two weeks now and am hung on
this one problem. Please help!

Cheers!
Isaiah Bellais