The measure of success is not whether you have a tough problem to deal with, but whether it's the same problem you had last year. (John Foster Dulles)
If it's so good then why aren't others doing it? Some use the term virtual - but our practice is built to work this way. We've had to narrow our services accordingly, but for those without a need for their accountant to hold their hand, this works well.
So there's no risk to you, and at minimum you might learn something about how well you keep your data.