It is recommended to rent a car to explore Corsica efficiently in one day. The daily cost for a car rental varies from €40-€80 depending on the car model and season. The driving distance to each activity location can also take a considerable amount of time with a maximum of 2 hours from end to end.
If you have more time, add a day trip to Bonifacio or hike the Cap Corse peninsula. If you have less time, consider visiting just one or two locations instead of all the activities mentioned. Don't forget to bring sunscreen, sport shoes, and a bathing suit!