We decided to try what a bus tour is. We wanted cheap and more cities to see. We bought a tour Budapest-Bratislava-Vienna-Dresden-Prague (110 euros - 6 days). The price is tempting at first glance, but keep in mind that most excursions are not included in the price. But you can choose whether to visit them or not. We took 350 euros with us (enough for all excursions and modest meals).