Your best bet is to start with the graduate schools themselves. Inquire about fellowships and assistantships. In exchange, you are given a stipend, and your classes are free. Inquire about jobs as Dormitory Resident Assistants. You may get a stipend, free room and board, and a couple classes free.
Many schools offer tuition remission to their full-time staff members.
This may help. Craig S. Grooms, associate director of admission, The College of Wooster, answered the following questions. Residency is determined by state law and it varies per state. You will need to contact the office of registration at each school to learn of the requirements for residency. Should I fill out forms for the soph.