Check with your local Board of Health. It’s likely that you will not be “permitted” to bake commercially in your home kitchen. (Not that that is never done, but if you do commercial food preparation then the facility has to be open to unannounced inspections from the BoH, and that’s problematic in a private residence.) Consider that if you do work “on your own hook” then you’ll be responsible for paying ALL of the FICA that you only pay half of when you work for a salary. But do check out the production / facility requirements for doing commercial food preparation in your area. (Leasing or sharing someone else’s commercial kitchen facility is an option – and “commercial kitchen facility” can include such unexpected places as churches and training centers, for example, or diners that are only open for breakfast and lunch, and are closed on nights and weekends.)