It takes all kinds, and there are all kinds of clients.  If you are good at what you do and can make a client feel happy and appreciated, you will get a certain amount of business regardless.  I myself prefer a woman who is kind of curvy, although I tend to like almost all women.  I am lucky that way.

I don't know if you have gone from "svelte" to "curvy", or "average" to BBW", so it is hard to know how to judge what your market would be.  However, I know a couple of BBW TER providers who are real sweethearts and are very successful.  If you are interested in contacting them for their experiences, let me know, and I will give you their contact info.

Mr. SD