That is one BIG plow with seven furrows being made! Heck my modern small tractor couldn’t move it. She probably needed all those horses to get that kind of work done.
Plowing 24 acres a day with horses is an incredible amount of ground prepared in a days work! I know they considered an acre a day plowing with a pair and walk-behind plow to be a good days work for a small farmer. A riding plow would greatly increase your plowing speed, with much less work holding it in the ground by the driver. Then add in size of plow, 7 rows, to make this a heck of a set-up for getting acreage into production.
I did find the hitching interesting, since she appears to only be driving the Leaders, no reins to each animal. But draft hitches often did that kind of rein set-up, only reins on some of the horses, while all others just followed.