Steel/Aluminium design/build, sorta smallish, cuts ali hopefully

[JAZZCNC]

Looks ok to me but I'd change the way the bed is constructed to help keep side frames from being pushed while welding and cut down on steel.

You won't need mesh that tight so I'd drop 2 of the long rails and flip other around and take rail across machine from each side in centre, this will hold sides together better and lessen chance of welds pushing/bending side rails. I'd then run the others up the machine and space outer ones so they land on the edge of the planned cutting area, they will support whole cutting area better. You will probably have a lower bed that goes right up to the sides but you'll also have a spoil board that is the size of your cutting area so ideally you want the edges of this to land on the supports and not rely on the bed underneath which isn't supported.
This also means you could drop the green bits because the bed will be supported where it matters, in the cutting area, and the small overhang which is a cantilever won't matter has it has no forces acting on it.

Other than that then fire up the saw. .