There's a pretty big one here. I know they just replaced 36 Exmarks of various widths (according to my equip dealer and I saw them lined up for delivery). I dont know how many crews they run; but I would guess at least 12 mowing crews.
This one nursery I buy stuff at from time to time also has a landscaping division and one of the sales staff told me they take in over a million a year from that alone. I don't know how many crews they run but it seems sizable. I bet alot of nurseries across the country are started by guys that first got their start in landscaping then as they got bigger, started a nursery.