Should I get a photo booth for my Mom's 75th Birthday Party?

I was thinking of getting a photo booth for my Mom's 75th Surprise Birthday Party. It is not the traditional photo booth with the strips that print because my Mom is wheelchair bound and would not be able to go into that type of booth. It is one where there are curtains around, and each person in the picture gets a 4x6 photo. I just wanted to see opinions about the cost effectiveness and appropriateness of a photo booth at a 75th Birthday party where there should be about 80 to 100 people of various ages. I also thought of possibly going around to the tables myself with my Fuji Instaflix camera to have a "Polaroid" type picture, which I could immediately glue into a scrapbook and have the people in the picture write a message to my Mom. Any opinions on this matter would be greatly appreciated. Thanks!