Nobody ever said that the choice of going into business has to be an in or out, either/or proposition. In other words, you don't have to go 100% of the way all at once. In fact, it's an extremely good idea to get started and test the waters while keeping the income and security of your day job. Then you can get a reasonable picture of how many clients you can attract and what they'll actually spend with you. This however, can lead to ethical conflicts, scheduling issues and thorny problems. Like clients who insist on being there for a session but are unwilling to sit with you in your spare bedroom editing suite after 8:00 o'clock at night. But, hey! At least you'll be in business for yourself.