
Days is reasonable, with two exceptions that make it immediate: if it blocks the only route out for someone with a medical need, or if it obstructs a fire lane or emergency access. Otherwise the risk does not grow while it sits. What does change is the wood — the trunk dries, settles and shifts its bind points over a week or two, so cuts that would have been predictable on day one can pinch a bar and move unexpectedly later.
No — it is already down. What is still saveable is your driveway surface and the trees next to it. A crew that skids the trunk across asphalt instead of lifting it will gouge sealcoat and crack edges, and an upright root plate left standing at the end can slam back into its hole once the weight of the trunk is cut away from it.