The reversed King of Pentacles indicates a not entirely stable situation, in which there may be some difficulties. It could suggest that your cousin is facing some problems starting her own business.
The reversed Ace of Swords represents an underrated or ignored effort, which can be both a good thing and a bad thing. In Rita's case, it could be a sign of lack of adequate preparation or planning for her project.
From the reading of the two tarot cards we can conclude that the results of Rita's business are not guaranteed. There is a chance that you will be successful if you can overcome the difficulties you may encounter and if you can put in a commitment corresponding to the scope of the project. Therefore the answer to the question is: No, there is not a good chance of success for Rita's business.