Seasons Greetings Pete
It was recommended to me to have 100 amps of single phase 220 to run a 20 HP rotary phase converter for a CNC mill with a 10 HP spindle like the Arrow 500. Word is, some CNC machines will run fine on a rotary converter despite the voltage variation of the derived leg, and some converters have less variation than others. Another option is a Phase Perfect digital converter
which I bet are pricey, but generate far cleaner power and users on the CNC forum here rave about them. I have access to 3 phase from the utility where my machine sits now so I have no personal experience with converted power.