Another job indecision

I have had a business as a landscape designer for several years. I can live from that but I can’t make big money out of it. I have some ideas how to evolve but I can’t find a way to make a lot of money out of it.
I keep on coming back to thought that it doesn’t make sense and it’s time to give up and find another job. This make me indecisive and have lot on lot of stress. I have this thoughts that I waste too much time.
Could you advise me how to deal with that?