There is no definitive answer here, but you should include one of the two at the beginning of your message based on what makes the most sense.
People may not want to give information about who lives in their home to unknown callers for a variety of reasons. This information may be used by telemarketers who could then ask for you by name when they call again, scammers who might do the same, or people who are not interested in your welfare. Women living alone for instance may use the “we” instead of “I” to suggest more people living in a house, and can even opt for using the machine generated message or computer generated “male voice” instead of their own voice to increase their security at home. For personal security reasons, you might want to avoid indication of children in the home, too, and you certainly shouldn’t mention that you’re on vacation.

That’s the simple structure of a voicemail greeting. Overall, your greeting should be professional, but the wording can vary depending on the situation. Check out a sample below.
For those with voicemail greetings that get changed about as often as a new president is elected, know that this is doing a serious disservice to the caller-recipient relationship. It signals to callers that the business is anything but an authority, most likely not very detail oriented, and has questionable overall credibility and competency.