Been pondering a similar size CNC and Solid State design for a littl eover than a yr, good stuff to see others throwing the towel at it too.
3000x1500 CNC
Build in 'Cartesian Style CNC' published by Said, Apr 25, 2014.
Here is my Project A CNC 3000 mm by 1500 mm, with a 2.2kW spindle collet ER25 and 4 stepper motor nema 23 425oz-in. The purpose being to have a large work surface for a minimum cost.