There are strict regs regarding what can be made and sold from a home kitchen, typically Baked Goods and some nonperishable foods. The rest especially those being able to cause food poisoning, require a health inspected kitchen typically separate from your home kitchen. Many states require you be ServeSafe or equivalent certified. This is a course in safe food handling and production, may not be cheap depending on whether it is available as private instruction or only at a Vo-tech or as a college course at a Culinary School. Then there is the Permits, Tax ID, Liability Insurance, assorted Licensing and FDA approved Labeling. My last look had this between $1500 and $3000, if you use a service. Some portion of the labeling rules change frequently, are not user friendly and are made up of crazy regulations. Example, if you use Ketchup, commercial or homemade, where the word is placed on the label has a reg. Whether the common name can be used or a breakdown of ingredients in descending order may be needed. Some ingredients have to be listed in multiple places. Any allergens need to be included even if one of your ingredient may only have the possibility of coming in contact with that allergen, or was produced by a company that uses or produces allergens anywhere in their operation. The nutritional label has to be designed. Terms like All Natural, Organic, MSG Free, Low Fat, Low Sodium, etc, all have rules as to what they represent and where they can be placed on the label.
I am just scratching the surface on labeling alone as there is much more involved. I have a project, some seasoning, I have been working on and would like to sell some day. I am looking at $5000+ just in the lawyer, licensing and label design fees and that's before I even buy ingredients, jars and have the labels printed! This all started with me thinking I could print a label, fill a small zip top bag and sell the stuff on Saturdays at the area Flea Market. I wish you luck and don't get discouraged when you find out all that is involved in peddling a jar of Killer BBQ Sauce. My Wife has to keep reminding me to just take it one step at a time...JJ