The reversed Knight of Cups indicates that the subject is in an unstable and unclear situation. He may feel confused and have difficulty making important decisions. The issues could be love related or friendship related, so you need to take some time to clear things up before moving forward.
The reversed Five of Swords suggests that the subject has no clear ambitions at the moment. His aspirations are confused and he doesn't know how to achieve them. Maybe he's looking for a way to avoid negative situations, but he hasn't figured out how to do it yet.
The reversed Seven of Cups indicates that the subject is facing a number of difficult decisions. Though he has aspirations, he doesn't know how to achieve them. Now he has to consider all aspects of the situation before deciding what to do.
Bottom line, the cards suggest that now is not the right time to start your own business. You should first take some time to clarify your current situation and better understand what your aspirations are and how to achieve them. Then you'll need to make an educated decision about how to proceed. The answer is therefore No.