I have experience of very large houses in the UK/USA and complex multi-pet sits along with medicines and would be sensitive to your dogs needs and optionally enjoy running which my dog-sit-dogs love about me. I have managed two huge black labs and even walked them at the same time. So energy/size is fine. We've also managed both very old dogs (with associated issues/meds) and rescue dogs (with their unique issues) and have references to that. I think it is a good match as I am home all the time (mostly retired). For a pet sit I am a HIIT sprinter which the dogs love as it is exciting to take them out and run about. For cats I like to hide small water bowls around the place as I find they enjoy the surprise.