You might want to check with Dr.Sutter he is a chiro and has the Ask Dr.Sutter forum.
What makes me sceptical about your chiro is that he knows beforehand that it is 10x and only once a week.
All the chiro's that I have been to it is several times a week and they can't tell you how long it takes.
As it is I usually stop on my own because I feel they keep me going too long.