The first card, the reversed Ten of Pentacles, indicates that the most suitable solution for your sister would be not to undertake the activity. This card represents a time when caution and prudence should be exercised, so it suggests that you carefully evaluate the situation before deciding whether to proceed with opening a business.
The Knight of Pentacles represents a more favorable alternative to your sister's idea. The card indicates that you may decide to go ahead with the business as long as there is a clear plan in place and your sister has the necessary skills to handle the situation. The card also highlights the fact that there will be opportunities to be seized on the road to success.
The Hermit indicates that in the final choice it is up to your sister to decide whether or not to proceed. When it comes to making a big decision like this it's important to listen to your intuition and take the time to think through all the possibilities. The card encourages you to consider all the pros and cons, but ultimately the final decision is up to you.
Based on the papers drawn it can be said that your sister's business opening will only be successful if she takes a thoughtful approach and makes sure she has adequate skills and information to deal with any difficulties that may arise along the way. Therefore, the answer to the question is yes, but it depends on your sister's ability to plan and prepare properly before proceeding with opening the business.