I have far too many memories of freeze damage in "winterized" homes where the winterizing procedure consisted of shutting off the main valve, opening a basement drain in the potable water system, opening all faucets, flushing every toilet, adding automotive antifreeze to traps and toilet tanks/bowls, and turning off the heat.
I was revisiting a boiler bid with customers for whom we've done other work in the past, and we were going over the two-year-old bid to replace their aging beast in the basement.
Based on my years of operating, coaching and training in the in-home service industry, if I had to name the top five struggles contractors face, one of them would be failure to grow at the desired speed.