for the reffing gigs, find out what officiating organization/s that your high schools use in your area. they can set you up with the company who will test you and obverve you. Once you are in its really easy to get gigs during the school year throughout the week. schedules will come out and you can pick and chose when and where you officiate. Obviously the tougher ones to pass are the major sports like football, basketball, baseball, softball because there are so many people out there who are applying for these sports. You can always pick other sports to officiate like volleyball, lacrosse, field hockey, water polo etc, to officiate. here in so cal, some of the people i know who ref get paid anywhere from 85-130 bucks for the 2-3 hours they are at the gym/field/pool. The lower levels of JV or frosh sports is where one would start and still, those refs get paid 70-100 dollars. my boy refs 4 times a week and sometimes does weekend tournaments where he gets paid by the # of matches he refs. makes very nice side money even with a full time job (he works 4-1 monday thru friday)
$500 + dollars "side money" a week is nothing to smirk at