Friendship or Business?

Base on my experience, It's hard to deal business with close friends because sometimes they would use friendship as a reason to delay payment that will soon turn out to be a debt. Or they would buy something from you that they become unsatisfied of, ruining your relationship.

On the other hand it's rather easier to make friends through business, where both of you create a mutual relationship between customer and seller. Customers just come and go, that's the good thing about it, no emotional attachment or anything but once they become close enough, they become real friends, it becomes a cycle. They delay payment that turns out to be an unpaid debt.