Scott - I'm not sure how long you've been a manager at McD's, but it's considered good training ground for other things. Instead of looking for a second job, maybe look for a better paying f/t job? I'm not sure of availability in your area or what you'd be looking for though.
Yep I second that...Macca's training is considered very highly and you could probably get a 9-5 Monday to Friday job for better pay. If you work in the City or close by and live close to public transport you could get rid of the 2nd car altogether.