We have seen people compromising on safety and cost by reducing/ agreeing to itineraries which have less number of days for acclimatization and later on cancelling the trek in the middle because of AMS or other mountain illness.
Every year we make sure a minimum of 2 days for acclimatization which also includes sightseeing to monasteries and national park.
You are requested to read articles or consult experts before going for high altitude trips.
Small article on Proper Acclimatization:
Co-Founder at Himalayan Explorers Club