HoppyGo is a peer-to-peer carsharing company. You can rent a car from ordinary people, who are not going to use it that day. This is why it is cheaper than a car rental company. Moreover, if you use a unique ESN VSB - TU Ostrava code: ESNVSB, you will get 200 CZK discount for each rented car of total price over 1200 CZK. You can rent a car in their mobile app or on the webpage: https://hoppygo.com/en.
Now the remote places you've always wanted to visit are easily reachable for you and your friends. Just be careful on the road and drive responsibly.