This one requires some careful thought. Eat what you kill is correct-- in today's world, you might starve-- I would if I did not have other income. Yes, I am in private practice, engineering and management consulting. Licensed in 2 states, graduate education, professional certification. I have a nice office at home, as nice as any office downtown, which I would like, but cannot justify the overhead costs. The home office is very comfortable, no kids or pets, so no problems that way.
Finding work is tough-- I am in the upper Rocky Mountains-- things are tough here anyway-- people do not want to pay for your services.
The having no boss deal is pure fiction-- your new boss is the client and she/he can be much more demanding than the old pointy haired boss (Think Dilbert). I have had some teaching and course development gigs that have paid a little, however, if I did not have other income, I would be screwed.
If you have not had any business training, I would take a night school class in FAST TRAC, a curriculum developed by the Kauffman foundation. I have taught this for 4 years-- it is very very good for an entrepreneur getting started. Call your Small Business Development Center or School District Adult Education dept. Google FAST TRAC and check find location-- it will tell you where a course is offered near you. This is well worth its weight in gold if you are going into business. The tuition is peanuts, $500 or so, however, if you are going into private practice, this is just the first of many little costs you will eat.
There are many more snakes in the business for yourself gig than you might imagine. However, carefully entering the game by being real analytical is very worthwhile!
As I said, if I did not have other income, I would be screwed-- and I am out every day looking for the next gig. Granted, geographically this is not a great spot, maybe I have the wrong skill set, however, don't jump before you carefully analyze everything. I work with way too many folks that are in business for themselves and have no foggy clue about what they are doing, let alone able to tell me that they are making any money.
Good Luck on your future endeavors.