Dress? Look in the classifieds for wedding dresses. There are all kinds listed, most of them unused because the wedding never took place. Here in Cincinnati on Benson Street there is a shop called Bridal and Formal Outlet which will order your dress for you if you know the manufacturer’s name and style for about 1/2 off.
Veil? Invest in a hot glue gun, go to a craft store and make it, esp. if you’re going with something as simple as a comb with silk flowers. Otherwise, borrow one or go to a second hand shop.
Caterer/hall – call hotels! My SIL got married last year and she had 125 guests. We found it was much cheaper to get married in a hotel vs. a hall because the hall charged for the space and then you had to pay for catering on top of that. At the local hotel, she paid for the food and they threw in the banquet room for free. Plus they comped a bridal suite for her when she blocked a group of rooms.
Another idea is a bed and breakfast. Beautiful location, small, intimate, and possibly thousands of dollars cheaper.
Another idea is a park with a shelter. A relative of ours had her reception at the state park. Cost of the shelter was $50. That leaves a lot of money for food.
Alternatively, go to another town. Prices of food/halls vary extremely depending on where you are.
Cake? I found a lady who used to work in a cake shop who made mine, to feed 350, for around $250. Look in the yellow pages for cake decorating classes, call them, and ask if they know anyone who makes cakes on the side.
Photographer? I planned my entire wedding and reception for 400 for $5000. The thing I didn’t go cheap on is the photographer. But do call around and compare prices and be sure to have them bring samples of their work! I paid $400 for 4 hours and that included a nice book. Beware of photographers that charge a low fee but then charge extra for every picture. That quickly adds up.
Flowers? - If it’s a smaller reception, ask the local florist to deliver $x worth of flowers and greenery. I did that last weekend with my daughter’s 1st communion. I had $40 worth of loose flowers and greenery delivered and was able to make 5 vases of lovely wildflowers. Tell him your situation and he’ll probably throw in extras, esp. if it’s on Saturday. Flowers are perishable and he’d probably rather give them away to someone like you than throw them out. Buy the cheapest glass vases you can find, or ask your florist for a dozen of the cheapest ones he has. Ask a friend to arrange the flowers and put them on the table prior to the reception. The key is not to be stuck on lilies or tulips, which are quite a bit more expensive. Daisies, carnations, wildflowers – these are all a lot cheaper than the “normal” wedding thing.
Good luck!