Looks Like I've gotten myself into a mess...... Fortunately after teardown and removal of non essential parts it looks like this might be easy enough. But for now there are a lot of questions. I've uploaded images from the teardown to imgur here:

 Part 1 and  Part 2

Are these motors accurate enough to be a 3d printer?

Almost all the limit switches are optical on this thing, is that good or bad for a 3d printer? 

I've heard that "inductive" limit switches are the new hotness, do I really need them?

The motor controllers might be salvageable and usable, saving some cash is always good. Looks like there are 8 "inputs" shared among the boards, since the original product drove 4 motors could this be step and direction for each motor?

What parts are left to acquire?

Smoothieboard or the Duet Wifi?

Which extruder? 

How to build the Bed?

How to do the z Axis, move the bed up to the extruder or move the extruder down to the bed?