Vietnam remains affordable, but there is a real gap between local and tourist prices.
Backpacker — 25 to 35 €/day
Dormitory, street food, night bus, occasional Grab.
Comfort — 45 to 70 €/day
3* hotel, mix of street food and restaurants, moderate excursions.
Premium — 100 €+/day
Resorts, luxury cruises, private guides — excellent quality-price ratio compared to Europe.