Best method for linear motion?

Hello people of best forum of CAD CAM!
I write from Argentina (sorry for the english)
I want advice about methods/systems for linear motion for a 2D/3D
cutting-milling machine for MDF (wood) with the best relation
cost/benefit.
The searching is orientated to mechanisms to move in 2/3 axis the
cutter-milling in table of 2800 x 2000 mm with precision of 0.5 mm
The motors will be Steps of 200 ppr. (No problem with the
electronics)

Questions:
1) What mechanical technology will be used for each movement?
2) What torque to the motors?

Any advice is welcome!

Thank you in advance.

Luli.