Compañía de carpeta removes most (if not sll) legsl obstacles to starting a business. Plus, you buy one today and within 48 business hours or less you can start selling all fully legal. Last time I checked, the cost of one was around US$2,000. Could be more now since everything has gone up. Many attorney offices sell them. Arrive today in SD, but one tomorrow, by the end of the week or less you are in business.
Just be aware many of these Compañías de carpeta have funny and somewhat generic names. If you want a name change, it will take longer for when you can start selling.