Any crafting class can now make their own subcomponents.
If you want to make your own spells, you want to be a Sage (follow the Scholar-->Sage path).
You will be able to make all your own ingredients by purchasing the appropriate Apothecary books (for washes/oils/resins/tempers, also known as WORTs) and Timbercraft books (for your quills and paper).
These books are available at your wholesaler, as are the Scholar books. When you hit level 20 (and become a Sage) your Sage books will be sold at your society.
Whether Sage is profitable (or any crafting class is profitable for that matter) I think will depend more on what your server's market is like. I do make money with my Sage; I am not rich by any means however.
Hope this helps!