Here are some tips on keeping the costs down and searching for the brooches because this will be your starting point. This is one of the most fun parts because you will get to choose the brooches you like and some that might have meaning for you. It is very easy so spend hours searching through the variety of brooches you can find online. Before you get started set a budget on how much you are willing to pay for each brooch, remember you will be purchasing 50-75 of them depending on size so look for deals, bulk listings, and combined shipping. This will probably be the most time consuming part so give yourself several months to search for the perfect brooches.
6. Add any other final touches to it as you see fit. Voila!
Some more links to help you in the process: