My sister-in-law lives on 2 1/2 acres that has 2 houses, multiple 12x12 sheds (6 I think?), a large lean-to shelter (about 10x40, used only for storage) and a small barn that consists of two 12x12 stalls and a teeny feed room in between.
The setup is great for 2 horses. The houses are at the very front of the property, the lean-to for storage is in the rear and next to it is the barn. She has 3 pastures and the barn is connected to two very large runs.
In order to have some grazing, the arena is unfenced and in the middle of the largest pasture. In the Spring, everything turns into a muddy, sloppy, yucky mess, so no riding or turnout for the most part to keep from destroying everything, but other than that, it works out.
She feeds the horses year round, there is grazing but not enough to count as "food" for the most part, except a month, maybe two when the grass goes nuts and she can cut everyone back to half the normal hay ration.
She spreads the manure daily over the pastures. Just fills a wheelbarrow, then dumps it in a spot and spreads it around with the fork.
It works for her, not ideal IMO as in Spring my horse was literally standing up to her knees in mud and I was up to my waist practically. It's insanely dry here other than the first bit of Spring when all the snow melts or spreading manure wouldn't work as it would attract flies. I decided to move my horse elsewhere.