If you want to start your own fashion studio, and succeed, you need to have a degree in fashion from a reputable school of design, as well as, some years of apprenticeship with an established designer.  It also helps to have a good partner to handle the marketing of your label, so that you become a known commodity.  You need to have the funds for your materials, advertising budget and staff; and you should factor in that you may not make a profit for at least three years.  There are web sites that speak about what it takes to make it in the fashion business, and one good one is this one: http://www.fashiondesignts.com/director.html.  You might want to contact Olga and get some information from someone who is doing what you are thinking about doing.  She teaches, as well as, having her own business.  Being on 7th avenue, well, it doesn’t get much better then that, so why not contact her and ask the basic questions about getting started.  Information about your industry, is the first step, in a successful process.