First, Heather convinced her bridesmaids to spend the Thursday before her wedding creating a sweatshop in our parents' basement
She purchased roses of varying colors, baby's breath, some filler, and these berry things (sorry, I can't remember their name) from a wholesaler online. They were shipped to the house Thursday morning in a million boxes and my dad filled wheel barrows up with water and put them in to stay fresh until we were ready to work.
She also purchased enough mason jars for each table, green ribbon, floral tape, and pins to keep everything together.
For the centerpieces, we started by putting some rocks in the bottom of the mason jar (the pretty kind from a craft store) and filled the jar halfway with hose water. Then we worked our way from the inside out. We gave each jar a certain number of roses (12-15 if my memory serves me right) and then filled the outside with berries and the leaf fillers. We completed the look by wrapping the green ribbon around the mason jar.
For the bouquets, Romina and I were in charge. We started by cutting the stems down to a manageable size and removing all thorns. We knew the bridesmaids bouquets would have red, yellow, and orange roses and wanted to display them in the center with the leaves on the outside. We started with a tight cluster of the roses (3 of each color) and wrapped the outside with a wire to keep them in place. Then we wrapped on top of the wire and floral tape with the pretty green ribbon and secured them with the white topped pins.
For the boutonnieres, we cut the rose down to about 2 inches before the flower, wrapped two leaves and some baby's breath around the outside, and shoved a pin in (it was much more elegant than that but it's tough for me to remember something from 3 years ago....where a lot of wine was involved).
And voila! We also made a tossing bouquet for later and Heather dried her roses and has them in a mason jar at her house.
I know this wasn't super duper helpful because I didn't really give step by step instructions but wanted to give a general gist of how you can make really pretty bouquets on a budget by yourself. The whole thing (20 centerpieces, 7 bouquets, 2 corsages, and 7 boutonnieres) took about 4 hours to do with 4 people working and a couple of bottles of wine to get us through the night.