Accurate Strong Gantry

[vargai]

The general opinion is that if >70kg you can not move it adequately with 2x3nm motors so you need bigger motors, which now puts you into position to find bigger but at the same time fast enough or go with servo, which to me seemed the better option.

Now I am looking back at your gantry design. What size are the profiles, why 4, why are not connected each other? Whats your idea there? At that size machine
2x 100x100x3 or 100x100x4 welded together with separation for ball screw or not /if back/ will be ideal. 100x100x3 weights ~9kg/m and the 4mm weights 12kg/m, So you co8uld still move that gantry by 2x3Nm nema 23

The modification is being processed hopefully more optimal now but from steel I have no to big margin with Z+Y plate gantry legs and all stuff (some item was hided on my dwg ) so it will be 100 kg anyway
When I saw my friend machine with the moving bed I said I would not want to move to and fro 120-150kg mass with material so it would be moving gantry.
Entering to this 700x1000 mm machining zone with rigid steel design I have to revise myself.
I am seriously thinking of the moving bed option now it is just 5-700 mm longer space and can forget many trouble i.e the dual motor, heavier spindle
My goal is a bit better an more accurate machine than a router so called semi industrial so within a 4000 -4500 GBP budget I would like to reach the best performance.