Unfortunately it requires extreme patience, the ability to calmly never take no as an answer and a lot of spare time available to stay on hold (hours a day). I

Unfortunately it requires extreme patience, the ability to calmly never take no as an answer and a lot of spare time available to stay on hold (hours a day). It would never scale to a full time business, but she got paid well to do this for two very rich people. (Who want to keep as much money as possible).