A single PM calendar across a portfolio is wrong for both ends of it. A 1966 building and a 2025 lease-up need different intervals, and the schedule should know the difference.
The first 24 hours decide whether this is a repair or a mold claim. The documentation you take in hour one is what an insurer asks for eight months later.
Emergency calls are the most expensive labor you buy, and most portfolios have no written definition of an emergency. The answering service decides instead.