use a belt driven compressor and a centrifugal clutch off an old washing machine
to mount to your motor, that way the motor is allowed to get up to the run winding
before the clutch engages.
much lower starting amperage that way :)
or use an automotive compressor with its clutch and allow the motor to start before engaging the clutch on the compressor.
much lower starting current for the motor, but you spend a few amps for the electric clutch.
just a couple of alternatives if you hadn't considered them.
fwiw,,,probably not more than you paid for it.
bob g