I think it is a great idea and if one of my friends asked me I would love to be a bridesmaid at her '10 year wedding' LOL! There would be so less drama then at the first time around!
Personally, I would save my money on fancy invites,like do my own (they have some decent kits out now) or so, and spend money on a really cool DJ or band, and reception hall (after the important vow stuff of course)!
We had a great DJ and guests of all different ages at my wedding, and we literally had to kick people out at the end (which ended an hour later!!) b/c he did a great job of working the crowd. Now (8yrs later) I look back at the pics and when I see people standing on the stage dancing to YMCA and waving in the conga line I smile and laugh at the good time!
This is for you , you do what will make you happy and have fun doing it!! Congrats on 10 years!