I've been creating 1 bag per room but I try to put a little something special in the bags for each person. If it's a couple I've included fun gifts for the girl and the guy.
I've gotten quite a few from the beauty section in department stores. I just ask whenever I'm shopping and add what I get to the collection. Good luck!
I got a cheaper dress for the trash the dress session. I had found one I liked in the bridal store and found it second hand on ebay in my size for way cheaper!
Definitely start as early as possible. You'll be amazed how quickly time flies. Especially if you plan to do any DIY projects. I'm a week away from my departure and I rushing to finish them all!
I'm buying shoeless sandals that I had made for my bridesmaids. I only have 2 so I was able to spend a bit more. I don't think spending 40$ each is being cheap at all. They will appreciate any gift you give them!