I'm glad to hear that your getting thins taken care of! That type of azz weakness is an epidemic in our sit-way-too-much society.

Here are some tips for making the exercises fit in your day a little better:
1) Treat them like a workout. Or even exchange them for a workout (like running).
2) Ask Walter if you can combine some exercises to cut your total time down. For example, I give an exercise that combines stretching the piriformis and quads at the same time, thereby cutting 2 exercises down to 1. I also have a strengthening exercise that combines hip abduction and exernal rotation.
3) Ask Walter to prioritze your exercises for you. There are going to be days when it will be impossible for you to get it all in and it's good to know what your 3 "Best bang for the buck" exercises are so that you can focus on getting at least those 3 done.

It's important that you give your PT feedback like, "This routine takes me 45 min to do and I don't really have that much time to do these consistently on a daily basis." Sometimes it's hard for us PTs to see past all the little things that we'd like to give you to do and remember that life still happens and time is not infinite. A good PT will help find the best comprimise between exercises that need to be done and life demands.