What people can pay

I am a successful creative who has been making a living out of it for 12 years, and now feel the pull toward training to coach others wanting to do the same, but struggling with limiting beliefs, uncertainty and overwhelm.

First question: is this niche enough, or should I focus on a more specific type of creative, such as food writers (which is my own craft)?

Second question: when I think of people in my circle who are examples of people I could help in this way, I don’t really see how they could afford to pay me very much when they’re struggling as it is.

Is this just a limiting belief of my own? Is it just about the MASSIVE VALUE I would provide, some of it for free?

Do you have examples of coaches who built successful businesses targeting people with as-yet limited means?

Thank you for your insights!