Norbu Hi this trip is good scheduled but there are a bit mistake on information. Such as the day 05, the day 06 will be also difficult because you will be assending in the morning from 2700m till 3200m and retuen to lodge then you will be assending again up to 3200m then descending down to 2400m then again assending up to 2500m. Cost seems resonable but there are possiblities to recduce down to $1000 per person. If you are with friends and able to get a porter will be much comfortable for you to viewing around and enjoying the beauties of Himalayas rather then having heavy load in back and puffing on uphill. I am also a trip operator in Nepal and have worked with many people from Calgary and Lethbridge. May be I can help you on it.
If you are interest then let me know.