I am doing a business plan and need ro get an idea of how much its going to cost.--Answer1:Make a list of what you will carry and how many of each then get prices from your suppliers. My guess20 bridal gowns cost 150 each 3K total100 brides maids gowns cost 75 each total 7.5K20 Flower girl dresses cost 50 each total 1K100 assorted things like ring pillows and vails costing 25 each 2.5KGrand total about 14K for a skimpy amount without shoes, gloves, purses or other accessories. I would probably plan on 50K to start if you plan to sell inventory not just have samples and order when sold.