This probably has more to do with your folks having a shitty relationship. Just tell mom to remind him that she gets half of everything hes got. Including the house.
I am suprised you haven't heard "when your 18 your out" since you were an adolescent.
Heres some solid advice:
-go to a college close to you.
-ask for disabled student services and talk to them.
-you must be able to show you have a disability. (shouldn't be difficult)
-Also check this site or ones similar to it. (google is a friend)
http://asperger-employment.org/assistance-for-individual/
You can also
when asked to leave refuse under the grounds you have a disability and that is your home. Cops cannot remove you if you are disabled.
You should realize that not all people do well having a disabled child. Often times is rips families apart. Its not your fault, but the resulting stress on a marriage and the physical manifestations of aspergers are seriously tough to deal with. Try to be positive and also take advantage of all assistance available to you. State welfare might even be able to help with some initial job education.
Distance may improve your family relations and with less stress like that in the environment your condition should be more bearable. Im sure weed helps some.