The main thing to convert to single phase is the spindle motor (8hp?), That is quite a large motor for 1 ph, single phase motors are not as efficient as a 3 ph equivalent and will take in excess of 30 amps, but this can be provided by a 240v 1 ph supply.
You should provide a suitably large conductors to avoid voltage drop on spindle start.
That is a large machine for home use, if you have the work to support it, I would look for an industrial unit that can supply the 3 ph.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.