Take a look at Gerry Davis Sports. They have three starter packages to choose from that offer excellent deals. You did not mention how much of the accessories and clothing you have but they have a full starter set up:
http://www.gerrydavis.com/Merchant2/...ory_Code=start
A Gerry Davis branded protective gear set up:
http://www.gerrydavis.com/Merchant2/...ory_Code=start
and a Wilson branded hard shell protective set:
http://www.gerrydavis.com/Merchant2/...ory_Code=start
I have the Wilson Chrome Moliben mask, also called the Davis-Wilson "New View" that Gerry Davis endorses. I love it. I especially like the Davis shinguards. I use the Gerry Davis stance and my fingers and thumbs slide under the knee cap to protect them from foul balls. There is no worrisome strap behind your knee to irritate you either. These shinguards have only two straps on the calf. I also have the Gerry Davis patent leather high top plate shoes as the top rated umpires and a AAA umpire I know all recommended them. They are heavy but they are easy to clean, look great and are very comfortable and supportive when standing all afternoon. They are hot in hot weather but great in cool weather. I use the original west vest chest protector because I call high school in the region that has produced four of the last five state champions and the one year this region did not win state they were runners up. Five different teams, by the way. Most teams have at least one pitcher hitting in the 90's on the gun. I had the Davis chest protector and I sold it to a friend who used it in a less competitive high school region. He had no complaints and said it was cooler than his previous +POS BB200 hard shell/armor plated CP. Good luck in your decision. I recommend you follow the other sage advice and get the best you can afford regardless of level you call. You only have one chance to make a good first impression. I was a coach for 18 years and I always gave the benefit of the doubt to the umpires who showed up looking like they knew what they were doing. Keep your stuff and uniform clean and in top shape and you will go far. Due to your age, you might have a future well above the level you work now if you play your cards right. I got into this too late to have any chance of calling above small college and I know I will regret it.