DD bday party help, Please!

[Singleminnie]

My DD12 is having a bday party in a couple weeks. We are going swimming at our apt. pool and having a spa like party, manicures and pedicures for 9 girls, plus a sleep over. We recently moved to a new town and these girls are all from her new school, so I want to make it a good one. I am also on a tight budget. Wondering if anyone can help me with the invitations, pool party/spa party girls?

I would appreciate any of the crafty people out there helping me!