Generally speaking, food baits usually are not an immediate draw. You could set out bait and wait in place for hours or potentially days if the coyotes in your area don't happen to take notice of it. I have had cameras on dead hogs where coyotes were there on the first night after being killed and the hog was torn apart and dragged off on the second night. I have had a hog that remained untouched in a field for 2 months. Baiting would be a better option for a trap that you are not having to constantly watch.
Calls, however, if they generate a response, it tends to be within minutes, not hours or days. Many coyote hunters will do stands at a given location for only short periods of time before moving to another spot. Some will run calls for up to a couple of hours. I think the latter folks are generally not hunting properties well suited for changing locations.
Run your calls for say 10-30 minutes and turn it off and wait for an equal amount of time as sometimes they will come in after the call stops. Repeat as necessary and time permitting.
If hunting in day time or low light, consider a wiggler to go with the call as it will add visual stimulation to draw in a curious coyote that has come to see what is making the noise.
Of course, if you are porch hunting, simply always be wary and have your rifle ready and ambush as the opportunity presents (taking into account all proper safety precautions, of course).