An automatic tool change spindle is a big investment/commitment — needs a compressor, and takes up working area, and one needs to have one tool holder for each tool station, which really adds up.
I wound up getting a quick change tool setup instead:
(though I didn’t get the nifty PV auto-on/off and speed control, instead use a BitRunner for on/off and try to set up my files so that all cuts are at the same speed)
which I don’t push hard — just run at the default speeds — still pricey, the only reason I could justify it is I do a lot of test cuts and there were some days where I felt as if I was spending more time wrenching than cutting.