Thank you actually I am a bit flexible but maybe around Santa Clarita would be a good location for me
Good luck with that. Homelessness is a huge problem in CA because of the high cost of housing and with the recent Palisades fire destroying something like 6000 houses in Los Angeles any sort of accommodation will be hard to find.
Because of this you can't just get an RV and live on the street, if that's what you're thinking. Homeless camps are a huge problem and trying to live in an RV on a public street puts you just one step above the tent dwellers. The stories and YouTube videos you see about people living cheaply in vans and RVs take place far away from any major city, usually in the desert along the Colorado River between Los Angeles and Phoenix or in the mountains in northern Arizona and Colorado to get out of the summer desert heat. These are several hours away from where you want to be.
That said, there are a few RV campgrounds in and around Santa Clarita where you may be able to rent a monthly RV space. They're not cheap, but may be half or less than what you'd pay for an apartment. This is completely legal and above board, I did it for 5 years while I worked in L.A.
Your best bet would be to start by staying someplace like at your parents' and use this as a base while you search for an RV and a safe place to park it. It may take some searching, like I said there are many people in the L.A. area who are looking for inexpensive accommodations and very few RV parks to accommodate them so the parks can be very picky about who they admit whenever they have a vacancy. You'll have to submit an application with the park that's similar to applying to rent an apartment including background and credit checks and you and your RV will have to be clean and presentable.
Otherwise you're looking at staying in the desert communities like Lancaster and Palmdale north of the L.A. mountains, a good hour from Santa Clarita. Even then there are relatively few RV parks (although more than in the L.A. basin) and you'll be in the desert heat all summer long. Bakersfield is another possibility, there are several monthly RV parks including
Bear Mountain RV Park. Bear Mountain charges $525 a month and it's a safe park but it's a good hour and a half north of where you want to be.
I retired 6 years ago and before that I lived in my RV for 5 years while working in Los Angeles. I was lucky to find a space in a nice RV park on Balboa Blvd. in Van Nuys. It's now called
Hollywood RV Park and they charge $1500 a month if you can get in. A large portion of their permanent residents are people in the entertainment industry who work on a specific project like a movie or TV series for a month or two, then they're unemployed until the next project comes along. They spend their time between projects outside L.A. where living is cheaper, then return to the park while they're working. When I retired and left the area the park owner showed me a stack of applications 6" tall on his desk from people looking to move in.