Slope at the farm entrance?

We receive 15% and that was the maximum for us. Don't just see the problems with the car (rain, snow, starting on the incline), everyday things are much more important. When the first child falls, the crying is loud.

And the garage at [EG]-level?

So, in the neighboring town someone has their garage in the basement, with the ground floor at street level. Therefore, they do not have a slope on the property, but the garage is probably just located in the basement due to space reasons. Unfortunately, I cannot tell you how steep the incline is. He drives from the street into his house / garage / basement in a 90-degree turn. If I manage, I will take a photo of it.

I would be in favor of a drawbridge - then the problem with the slope would be solved and the garage on the ground floor.

Or with lifting platform

So in Landsberg/Lech, the old Bergstraße has an 18% incline and for this reason, during the era of horse-drawn wagons, it was the only road in Germany with left-hand traffic. This gave the wagon drivers a slight chance if the brakes failed (they could save themselves by making a hair-raising jump to the side of the road).

"Due to the steep slope of 18 percent, there used to be frequent accidents with horse-drawn wagons on the Salzstraße. To prevent injuries, the drivers had to walk on the left side of the wagon. It was also forbidden under penalty to lock the front doors so that pedestrians could take refuge in the houses from out-of-control rigs. Moreover, stone bollards were placed downhill on the left side, against which the coachmen could steer their teams in an emergency. These 'brake blocks' still exist today." (Wikipedia)

Just to get a feeling for the slope...
So I consider 28° a no-go!