The higher you climb, the more expensive things are. This is because there are no vehicle roads, everything is carried on the back of a mule, or most often, a porter.
To hire or not to hire a porter on your trek?
There are two permits you need to get. One specific to the trekking area, and another one called the Trekkers Information Management System (TIMS).
If I went on this trip again, I would do a few things differently.
If you are heading for the mountains in Nepal, here are a few things to consider.
Hiking part of the Annapurna Circuit was my favorite thing I accomplished in 2015. Here is a list of the things I carried.