I finally committed to a weekly DM lead order a few months ago. Was surviving on TM and internet leads for years. I only get 15 a week, but I can almost guarantee you that if you will knock on all of those doors you will make at least 3 sales. It takes me 2 to 3 days and I average about $2500AP weekly. You won't fail if you will contact the leads.
There is always a catch to everything!