> It seems inevitable that clients wonder/ask why you can't get X, Y, and Z done in a "week", As much as I like the 'per week' idea, there's often stuff I can'

> It seems inevitable that clients wonder/ask why you can't get X, Y, and Z done in a "week", As much as I like the 'per week' idea, there's often stuff I can't get done because someone is sick during a week. Client's don't particularly like that. If they wanted to be paying someone $x/week regardless of work output, they'd hire more employees - they're often using external contractors for multiple reasons, but efficiency is usually one.