From the sound of it, you aren't ready to have any more pets. Take care of the ones you have and wait to get any more until you move out and can care for them properly. I understand the desire to have what you want "now" but growing up means learning patience and making responsible choices. Hiding it from your mom and putting the snakes in less than desirable conditions is not being responsible and is a really bad idea.

Though I have a feeling nothing we say is going to make a difference and you will do what you want anyways. We've all been young and impulsive at some point.