Oso954's idea is the best so far.
By do it that way you would have enough amps to run even more machinery, add a 220 volt window A/C, run the lights on one circuit, outlets on another and not have the lights dimming and having to run inside the house if a breaker trips.
All the outlet wiring should have been on it's own ciruuit on a 20 amp breaker and be 12-2, with GFI protection.
What's your's?