Hiya, big hugs and well done !
Sugeestions here much in line with Noah's with asking what business plan meetings are currently held in each individual nursery, inviting views and opinions on where they see their own setting heading and maybe what routes they feel would help it get there. Arranging social whole group get togethers to dicuss what's gone on so far - once or twice a year maybe would be excellent to reflect on how everyone has settled into new routines/ideas.
Shopping list strategies might be good for placing control/deploying responsibilities of provision into the hands of staff - encourage all staff members to write toys & resources that they feel are lacking in their own nurseries. Prompt leaders to write these down as & when the suggestion arises (lol
photographic memory is on my want list !!) .. and then if possible allow time once a week to go through that list, feeding back to everyone at staff meetings ?
Any chance the owner can have more hands on opportunities so that staff don't feel they've been isolated from the top tier of management ?
Best wishes
xx