Doubtful on co-sign issues.
My kid was initially sharing with six other friends, only two of them -including my kid- parents supporting kids, rest of them support was limited funds from parents. Those four friends worked part time and making their student life.
Then, my kid moved to studio apartments, again same situation but half of them supported by parents. Often seen managers vacated the property and keep the materials out of door. My kid used to inform me that those students not paid rent on time, their stuffs are on the road after legal notice on door. That was 32 studio apartment complex, every visit, we noticed this.
Only good place was college run Graduate Dorm, neatly maintained (compared to these apartment complex).
Instead of US Davis, you can review Berkeley as it is near to bay area, but you can not avoid such story.
Apartments are attractive ROI, but needs to have tough legal hand (Manager) to enforce rent.