Restructuring four S Corps Into QSubs?

I am in California. I have four s corps for my four business startups. Since they're all private startups owned and operated by me, you can tell that I'm putting in a lot of money & taking out little to nothing to keep things running. I am paying a lot in tax and accountant fees just for operating four separate entities. At first, I thought of a holding company, but then I realized I would have five separate entities so that it would be worse for my situation. I was looking into QSub. Will the companies remain registered as corporations and maintain their Inc suffix? If yes, do I still need to file the state's SOI and FTB for each or just a master one?