I think she need a proper research to start it, because if she doesn't understand the facts now, she definitely would go in Loss. Tell her the fact that she is going to waste her money. Because as a friend you can force her too to save her investment from such a business which is not so profitable. She should start a business which may give him a handsome income in return.A friend came to me today to discuss about a business she is about to venture in, the issue is I have heard about that business and I know it is not profitable, but do I advice her not to go into it? Because she didn't ask my opinion and she was so excited when telling me about it. I don't want to look like a spoil sport.