I once took on a route of apartment shops, all targeted. I never reached a single target by phone, and had to e-mail the scheduler and get the OK to go without reaching them by phone.
First apartment complex, I (stupidly?) asked the guy if he had received my messages. He said he didn't know: "I don't have time to answer the phone, and I don't listen to voice mail." Well, that at least explained why my efforts over 3 whole days were unproductive.
Second complex: Employee no longer works there (client error).
Third complex: No employee of that name works there, or ever HAD worked there. However, target from complex #2 was there!
I have never done another apartment shop; I was so totally stressed, I just couldn't handle it. I did get paid for all three, and the company has asked me again to do apartment shops, but the entire experience was -- well, I just didn't want to repeat it.
I think you guys who successfully complete apartment shops are road warriors! Too stressful for this shopper.