Only you will know the answer to this. However, this program is what I would call the minimal time commitment to see measurable results in strength. Ideally, you will perform a least 2 of the strength workouts per week. Each workout will take most people 40 minutes to an hour including the warm up.
If you are practicing the optional mobility routines in the Push It e-book, which is not required, they will each take about 20 minutes and can be done in conjunction with the strength program or on rest days. Whatever fits best in your schedule!