If what you're saying was possible then the OP won't have come to the forum to asked for suggestions. Also it isn't always about the money, we have people that value their free time more than any money they can possibly make from stressing themselves. Probably the OP is getting stressed from working his main job since that which is his passive income is giving him more money so he's seeking for recommendations on what to do.

If I were in your shoes OP, I would quit my salary job, reduced my expenses and work on making my passive income more productive. Before, you had your attention divided and yet your passive income was giving you equal or slightly more than your salary job, now imagine what will be the outcome when you have all your attention to your passive income works. I always advise people to chase their dreams and not die working for the system.