I'll put it this way, we have my own old tree business in Vernon, Davey, Bartlett, atleast a handful now of other 'established' tree businesses.
There is not a single one that I would give a open two week window to come and do work at my place when it suited there schedule. Never.
Every business I have contracted to do work on my property has set a date/time. So again maybe it's cultural thing, here it's not a casual get to it when we can kind of environment.