This is one thing that irritates me.
I wait 24 hours. Past that I am done.
I can't stand people who have their listing set to active in my city but are actually out of town for 2 weeks.
Or, they are currently with an extended client, or sick or whatever but they still show their listing.
Why not put an auto reply on your text that says you are unavailable, or change your listing. It is just dumb because people who reach out while you are away just assume you are a flake.