In general, Americorps programs are run by non-profit organizations -- many of whom are run very well and some of whom are run poorly. I would begin by finding out information on the organizations with whom she is hoping to work. The Americorps program that I supervised worked in a distressed urban environment and did not provide housing since 100% of the target population for applicants was local.
The stipend offered will vary by organization as the Corporation for National and Community Service (the granting organization for all AmeriCorps programs) offers a minimum and maximum range of stipends that can be offered. The educational award is wonderful for students!
Consult this website for more information on the AmeriCorps program:
www.americorps.gov
Karen