Well, without knowing exactly why you are in a foster home I can't really say.
Your turn to answer a question... Is it possible you have forgotten the real reason you are in foster care, and have glamorized your other home life?
depends... know the foster system really can suck but in some situations your chances there are better... how about a childrens home? it's not the same there...
then how about look for a job and get a room or something?
than look for a place to stay by your self... so simple