naturalmaya ji,
i dont know why your friend is having a hard time to find apartments in sunnyvale , coz there are plenty of apartment complexs no matter what your range is. recently the rent has gone up which is usually correlated to hiring of IT professionals in bay area/silicon valley but still there are some areas in sunnyvale which are managable.  please advise them to use craiglist, it wont take long, unless he wants a really good deal. Please tell your friends to concentrate on these streets , Fairoaks, Mathilda,Hollenbeck, Bernardo , Fremont. There is a good community of Nepalese around there as well.