In fact ,it is hard to reach +/-0.1-0.15mm while others have accuracies of +/-0.02-0.04mm ,when budget is within 4000$ , at same time ,your worki is also cutting aluminum . constaint power spindle is also necessary .
How use 1325 6kw constant water cooling spindle to cut 3mm thickness aluminum panel
https://youtu.be/MnqL_N5J2Qc