Some costs move with rent
Deposit, key money, advance rent, and brokerage fees are often calculated from rent.
For luxury rentals, one month of each item can become a large number.
Fixed costs also add up
Guarantee company fees, insurance, key exchange, support services, and move-out cleaning can increase the total.
Separate mandatory costs from optional services before applying.
Summary
Initial costs are easier to understand when rent-linked costs and fixed costs are separated.
Ask for a detailed estimate and compare the two-year total.