Hi everyone, I am looking to buy a CNC router for mainly signmaking. I need to be able to cut Acrylic up to 2-3cm, PVC 2-3cm, Composite Aluminium 3-5mm and if possible aluminium 5mm.

I would like to know what I need to look for or check when I purchase a CNC router?... Most important is speed and precision with small items...

like what are the parts are most important and that could break with cheap machines?