The fact that you are asking the question says to me that you are capable of building a successful SFI business.
I believe that everyone is capable of being successful if they don't defeat themselves.
What do I mean by "defeat themselves"? So many people defeat themselves by not believing that they can do it. SFI is a great business for everyone if
1. They take advantage of the training that is available.
2. They learn from their upline or seek upline help if it isn't provided.
3. They understand their SFI business will take time. It doesn't happen overnight.
4. They take the things they learn and modify as necessary to make it their style.
5, They never say to them selves "I can't do this."