I realize this and that's why I mentioned a way to make your own three phase power on the cheap.
Use a three phase motor, fed single phase from your garage, and once you start the motor it will produce three phase power to run the three phase motor in the lathe.
Single phase will run a three phase motor but it will not start it. Some folks just use a large pulley on the three phase supplier motor and give the pulley a little spin with the foot to get it going.
