Put the nights in the right places
Keep a single Rome base for the Vatican outing. Price the trains before rooms and compare Mestre’s full travel cost with historic Venice. The daily figures are chosen allowances, not hostel offers. Guided walks described as free may still expect tips.
Plan the visits
Rome · Florence · Venice. These guides explain the current ticket choices, arrival points and useful areas for a room. Reserve the visits that matter after checking travel days, with arrival afternoons left flexible.
Shorten the trip
Removing one city usually saves more than cutting meals or choosing inconvenient arrivals.
Build the budget from nights and days
The day figures add up to €547.00 for one traveller before the extra costs below. Day notes show accommodation, meals, local travel and small extras. The simple stay line buys one bed. These are chosen allowances, not measured averages or available room offers. A Vatican day uses the existing Rome base, and its local journey is within the local travel allowance. The final day has no extra overnight allowance in the Italian section.
Add paid visits, excursions, intercity tickets and airport travel. Replace the stay amount with the full booking cost, including taxes and cleaning. The city budget cards are an alternative way to plan the same days, so do not add them on top of this subtotal.
Plan the Vatican entrances
Use the separate Basilica and dome guide and Museums guide. Keep the existing Rome room and local travel allowance; paid visits are additional to these day figures. A dome booking can place Basilica access before or after the climb, so follow the actual voucher.