career advice-how possible is it to make web apps on your own for a living?

Hi! So I am finally able to make my own web applications! (Hooray and a big thank you to Team Treehouse!) So now I am wondering about how to get a career with my skills and where to focus my efforts (for example, will I start searching for employment, or learn business skills to sell my apps).

Is it unrealistic to try to make a career on my own at home making web applications? Do many people do it and if not, why not?

A bit about me and my own thoughts:

Working from home is a high priority for me because:

1. I really don’t like traveling.
   
2. I love the flexibility of working when I want and taking a break when I want.
   
3. I work effectively on my own.
   

Working on my own appeals to me because:

1. I can choose what I work on, something that I am passionate about rather than work given to me that I am not passionate about.
   
2. I can put more time into learning more skills.
   

Drawbacks that I can see from working on my own at home:

1. Knowing how to code won’t be enough. I’ll need to learn business skills like how to get people using my apps.
   
2. When I get stuck on something, I won’t have a boss or co-workers to help me.
   
3. I’ll need to wait longer before I start earning money (because I’ll need to learn the business skills and make my apps better).
   

So I think taking these things into account, I would still prefer to work at home on my own, assuming it is not an unrealistic expectation or a foolish path to choose, and I don’t know the answer to that. Do you have any advice to share, please?