Help im going to be a guitar player?

ok i ask some one to play guitar for him because he was becoming a singer so I'm in the band. i want to know how munch money i would make.if i have enough i may pay rent for my mom. plus i could use it to get more equipment for my guitar and more guitars. so help me out. hey please use year month day per concert and simple stuff cause i has to ask my mom and she may not know it so make it as easy as possible.