i just got a call from an old lady that wants her lawn mowed when her grandson can't get to it. this could be once a year or once every 2 weeks, who knows. the hassle is that i can't put her on my normal schedule if its gonna be hit or miss mowing. on the other hand, its right across the street from a lawn i already mow. i told her i'd put her on the friday schedule and if her grandson mowed it to call me and let me know. she said no, that she'd call when she NEEDED it cut. i feel that this will be a PITA and that its fair to charge a bit more. what would you do?