Rome, Florence, Pisa and Venice in six days, all connected by train, no ferries, no coastal buses, no guesswork. This itinerary breaks down exactly what to see each day and what it actually costs, from the 18 euro Colosseum ticket to the real math on whether Venice is worth an overnight stay or just a day trip from Florence. Budget travelers can expect to spend 420 to 500 euro per person across the six days, plus flights.