When I had a full daycare with 5 kids no. My selling point for most of my families was we stayed on site (huge backyard). But, as you noted long hours and no time for errands or other things was really not working for us.

I then closed the daycare and kept one child. We now spend our day in the main house (not in separate daycare space) and the families knows that I do tend to the house during the day and run errands as needed. It is manageable with two children (both approx. 2.5yrs.). They find it fun. I go to grocery stores with the double carts so they sit side by side and giggle the whole time etc. I would have ZERO desire to go out for errands with more than 2!

If you plan to you need to discuss it fully with parents so they know. You DO NOT want to run into a family member or family friend and have them casually mention seeing you to the parents if the parents do not know! You just need to be transparent with the daycare families. Mine knows that for periods of time their child needs to entertain herself as I do laundry, cooking, cleaning and house tasks during the daycare hours to free up my evenings for family time. I made sure they knew this so when their child, who is talking more and more, goes home and says I was ignoring her, or wouldn't play with her or whatever 2.5yr olds randomly report I am able to clarify that while doing laundry she was told to go play etc.

7am-6pm is an incredibly long day. Why do they need such long hours of care?

If you start running errands a god way to off set it is to run a few on the way to the park. Then the kids get something to look forward to after the boring adult stuff and if they complain to the parents they had to run errands you can follow up by saying, yes we stopped at the post office on the way to the big park. So the parents see you still have the kids in mind.