First-Aid Kits business. Putting together first-aid kits is a great business for those looking to help. Business Overview Two of the best aspects about starting a business that assembles and markets first-aid kits are the facts that the business can be set in motion for less than a $3,000 investment and first-aid kits are in high demand. First-aid kits can be assembled, packaged, and sold to retailers on a wholesale basis. Or, the first-aid kits can be specially designed and...