I talked with a guy who would send out twenty or so clients a year that he was interested in a letter saying that he was interested and would like to be included in any bidding process for the maintenance. He netted some nice large commercial stuff this way. It's an idea that I haven't tried because I've been so busy with residents. I have a couple large commercials that are my best clients by far. One called off an ad and another was a referal from a mower repair place. It's been very nice to have a couple large ones.