Profitable; yes. That is relative to your imput/operating costs.
Can you quit your day job; not likely. I believe that is what Lucy ment by her response. ( Lucy, if I'm wrong, don't bean me with that rotten mellon...lol )
Good place to start; most definately. Better than coughing up the expense and labor of a larger one only to find out your hobby isn't something you want to work at to make a living. ( a common mistake made by a great many )