Outsourcing production can have some advantages for a new start-up product provided there are existing suppliers qualified to manufacture the items to your specifications. Control over the new product can be documented in contractual agreements. It is always a good idea to have more than one supplier, if possible, to ensure you can meet your product delivery demands. However, multiple suppliers can create problems with maintaining consistency of quality.
Outsourcing also means you would not have to invest heavily in developing your own infrastructure. Your market research and your business plan should give you a basic idea of your potential sales volume and selling price, from which you could calculate a break-even point in terms of recouping your initial investment when you switch to outsourcing.