One could make the argument that ants have the potential to require more tools to eradicate than any other pest species. Unfortunately, there is no “one-tool-fits-all” solution in the case of the ever-pillaging, ever-reproducing and always-aggravating ant.
Identification of the target will guide a technician to the right solution, whether it is bait or a pesticide. Meanwhile, advise your residential customers on daily ways they can help alleviate the problem, such as keeping various household areas clean and watching for access points.
Remember, in the end, identification is the one tool you will need on every ant job.