I tried this in spring 2000 for lawn fert programs. We paid by the hr and they generated leads economically. At the same time we did direct mail. I closed maybe 30-33% of the dm while I was closing some miniscule single digit # from the telemarketing. Since I have to do more than sell I didn't even bother to estimate the last ones I got cuase it would have taken time away form dm estimates and other important management tasks. Maybe with a sales staff on commision that has nothing to do but hound people it might work but not for me.