This is out of left field, but I'd use it to start a huge home cleaning business. All those homeowners need to clean rooms between guests, why let some other company take that business?
As for other ideas - what else do hotels spend money or hire people to do (cleaning was my example)? Those are the natural areas of expansion.
As for other ideas - what else do hotels spend money or hire people to do (cleaning was my example)? Those are the natural areas of expansion.