Home based business: Bridal Make up Service

I have a friend who is interested in starting her own bridal makeup business. I know that most magazines use airbrushing to make models look perfect. My friend is wondering if she should get her own airbrush makeup machine for her business, if the investment is worth it. I think these airbrush makeup machine are quite expensive yet they make the most imperfect face look almost perfect. She has to do her research then.