You can make a living working for a builder with desirable homes and locations. You will find the limitations of selling only the builder's homes can be frustrating. You, for example, may know there is a home in your builder's neighborhood that matches perfectly what the buyer prospect wants, but you can't sell it.
You may also find that the sales systems and sales management of a builder can be strange and counter-intuitive. You may have to close the office on days and times when you know people are looking. The forms and computer-based reporting may be arcane and hard to deal with. When you're your own boss, you decide when to open and close, what documentation to create and how to handle it. You'll have to fit in with the builder's systems and policies, including things like cross-selling credit.
If you do decide to go private, you will likely want to keep your license active, just in case.