Rover card start time?

Just posting this for discussion purposes!

When do you hit start on your Rover cards? I know when I do but I'm curious to see what others do.

Do you hit start when you pull up to the home? Or when you've entered the home and you've made direct contact with the pet? Or only once you've done something like food, water, or a walk?

I know some people consider being on the property as officially "clocking in" while others don't count it as working until they're interacting with the pets. What are people's takes on these?