It is very important to consider the old adage which says," do not put all eggs in one basket". What you are doing is because is activity oriented business, where you will alawys be on the net surfing, connecting to the large group of members of sfi to meet your potential customers already segmented for you by sfi, there will be no hussle in finding the market for your product or buy what you want without spending more. That's why it is more important to invest in sfi.