A kindle direct title can easily earn you $3 profit even if you keep the price very low, and more like $7 if you price it like a normal book. So if you're able to move that many copies, then certainly yes.
Self-publishing is more profitable per copy. With a publisher you'll make ~10% of cover sales (so $1-1.50 per copy) versus the above.
Publishers offer [small] advances and cover some of the costs like editing. If you can pay the $1250-3500 for a cover design and editor, and can do the marketing, then you don't need a publisher for anything else.
The resources you're going to want are:
* KDP (Kindle Direct Publishing for main distribution)
* CreateSpace (turn PDFs into physical print-on-demand and list them on Amazon)
* Scrivener or softcover.io (writing apps that easily export to ebook formats)
* Wordpress + Themeforest (or softcover) for a book page