If you're a competitive applicant, you may be offered multi-year fellowships as recruitment funding that will cover all tuition/fees and provide a living stipend and/or guaranteed employment for the majority or all of your time spent in grad school - these are commensurate with cost of living, so CA schools are likely to offer higher living stipends, etc. Most Ph.D. programs, regardless of location, are 6 years long, but this data is readily available on all schools' program sites, as well as their internship match rates and other important outcomes. When applying to programs, pay attention to what types of funding they appear to offer to students. When interviewing, be sure to ask how many students are typically fully funded and through what type of money (teaching/research assistantship employment? lab grants? block grants? tuition-waivers?) Some schools have more difficulty funding their students than others and will be open about it. However, even in these schools, funding can vary wildly depending on who your advisor is, so it's important to ask his/her students directly about their funding.