I have a large home with large open spaces and little clutter on the floor. But I'd need something like 8 Roombas to cover it all because of the changes in leve

I have a large home with large open spaces and little clutter on the floor. But I'd need something like 8 Roombas to cover it all because of the changes in levels, doors that are normally closed, etc. Also, as a semi-wealthy person with a large home, I hire people to clean it including vacuuming, and I don't need an annoying robot roaming the house to do it.