If your client wants to get from San Francisco to LA for a meeting on Tuesday, you can achieve their objective in many ways. You can give them the phone number of a Limo Driver, buy them a first class ticket on United, rent them a car, drop them at the bus station, or even hire them a private jet and sit next to them on the flight to make sure they arrive safely at their meeting.
All of these options achieve the objective, but the value to the buyer depends on the buyer's priorities.
The same thing is true when you are thinking about options for your clients. What is most important to the client? TIming? Ease? Speed? Thoroughness? Independence? Follow-through? Consider all of these in your options.
The ability of a consultant to maximize the value provided to the client through creative delivery of services is what separates the great consultants from the merely good.