What should i do about getting actors for my film?

I want to make this short film and i need actors. I could ask my friends to be in it but idk if they are good enough %26amp; if they are going to be serious. Thats why i want actors that i can audition but i'm sure i have to pay them, %26amp; i dont have that much money. What should i do?|||find a school that people go to for acting, get them to do the job, that mite be the answer, what do you think. smile|||Post an ad on backstage.com