Hello K.,
Congratulations on your upcoming wedding! Everything will be fine. There are weddings of all sorts of budgets. I am a wedding photographer but in Vegas otherwise I would love to help you out, but in my line of work I see every budget there is to be seen. I have shot weddings in a warehouse, yet decorated very nicely but still inexpensive. Ask for some help of your girlfriends, especially those who have already had a wedding. Look through bridal magazines or watch some of the "Do IT Yourself" channels, they always have excellent ideas. I saw one yesterday where they took a 6 x 6 square piece of wood and used cabinet hardware knobs (all the same and covered it with pretty cloth with a staple gun and it was perfect for a centerpiece stand. You can put candles or a vase on it.
When you are talking to your friends, let them know what you still need and perhaps they have a referal. If you don't have a hall, check with your church or do a lot of calling around. Some halls will do the decorating, some will just rent the room. For the photographer, just be sure you are happy with their work. I DO NOT suggest saving money by putting disposable cameras on the tables. They get expensive by the time you put 2 - 3 cameras on each table. People maybe drinking and then decide to take a picture and then you will have to pay for the processing and printing of blurry pictures. Further, a lot of people don't get the idea and they take the cameras with them. My brother-in-law is sick ~ he will take the camera in the rest room for a close up of the ol pecker and then go put it back on the table.
Anyway, you can do this. Possibly this is all overwhelming for your fiance and he doesn't realize what all is entailed. Start making a list, call places, get quotes, and present it to him so that he has something to work with. Start with your most important things first. Location, clergy, invitations, cake, food (dinner or just finger food), drinks (first soft drinks and if the budget allows bar or they can pay their own tab), & photographer. When getting the location, food, and bar ask if they have table clothes and and decorations or table settings.
Email me and maybe I can help with the invitations: ____@____.com.