I'm an italian girl and I've been living in Berkeley for 6 months. Before leaving on July the 4th, I would like to plan a last on the road to San Diego. The problem is that I'm 24 and the fees are incredible high for people under 25 years old. I tried everything. My plan was to rent a car alone and to arrive in Santa Monica in two days (visiting Monterey, Carmel-by-the-sea, Big Sure, Santa Barbara, Malibù). In Santa Monica I have a friend and with her we would go to San Diego. Coming back I would take flixbus.
From LA to San Diego we can use the train, doesn't matter, but I really wanted to rent a car for the stretch of road from SF and LA. I'm really easy going and after 6 months in the bay area I cannot spend a lot of money. Hostels, camping, cheap motel, are perfect.
I was planning the trip on june the 27th (thursday) because my friend has a job so she is available only during the weekend and I would like to arrive in Santa Monica on friday evening. But even the weekend before is okay.