Well, the key word here is automation. I'm routinely out of town a couple weeks at a time. I've spent a lot of effort on my dosing and water change systems and they are now fully automated. I know that kh and ph are directly related to c02 levels and of course you can't go strictly by the chart, with so many other things affecting ph, but there should not be a problem establishing a base line standard in my tank, like you said using a drop checker, and using the ph controller to keep the c02 levels constant without having to check them.
Does that sound reasonable?