What's a reasonable price for ten days of dog-sitting?

I will probably be looking after a poodle in January. Tomorrow, I’ll be discussing details with his owner. I’ve taken care of dogs before, but this time, the owners are strangers to me. I know it will depend on the area you live in, but I’d still like to know: What daily rate would you be willing to pay? I’d be walking, grooming, entertaining and training this dog. Of course, my life wouldn’t change much, as I do all that with my dog, anyway. On the other hand, this poodle is only 16 months, pretty energetic and a little difficult to handle. So, all advice appreciated!

If I find out they own a mansion, though, I will disregard said advice and rip them off.