Upload & Sell: Off
First...my standard intro to anyone "new" to me on this forum...
My comments or suggestions below are not a criticism of you, your model, your talent or skill. I offer them in a friendly tone of voice and with the sole intent to help you with a second POV and set of eyes. If you read sincere questions and simple suggestions as "criticism" of you, then you will miss how I am trying to help you.
Of course this may be your own "style" or your own "vision" and I suppose we can assume that the images look just like they do because that is exactly how you like them. That is OK too. It just shows that there are differences of "opinion" on what looks good. IF these are exactly what you want and like, then by all means continue making your images look like that and have fun doing it. As I always say: "Follow your own muse."
The following comment comes with some careful consideration and not given lightly.
I enjoyed seeing these photos, and think they are among the best I have seen posted here on FM in this genre (what some call "FPJ").
Lots of nice expressions and moments captured. Many appear authentic to the people and their relationships.
Nicely exposed and colorful images too.
As for your question on whether it is a viable part of a business?
I think that really depends on YOU and how you market (sell, price, promote) yourself.
IF I were a parent, I would hire you (one of my highest compliments).
Assuming I could afford any price, would I want to pay it?
But, the real question should be: Can you be profitable IF you spend so much time making so many photos etc.
Only YOU can determine if your time is rewarded (paid) adequately for your effort and time and creativity.
I hope these comments help and encourage you.