In a town running three shifts, the eleven at night call is the one that converts
A round the clock hospitality economy puts a real share of your buyers outside standard office hours, and voicemail loses almost all of them.
An owner who works a swing shift makes calls before their shift or after it. An investor in another time zone calls at what is a normal hour for them. Neither is going to leave a second message.
Decide what happens to those calls before you spend anything on getting more of them. An answering service that captures the address, the property type and a callback window is usually enough, provided the callback actually happens first thing.
Measure the answer rate by hour of day for a month. Most firms find one or two windows where calls are consistently missed, and the fix there is scheduling rather than technology.
After hours availability is one of the few claims in this trade that is easy to prove and hard for a competitor to copy quickly. If you can back it, put it in front of the buyer rather than in a footer.