Garage with gates at the front and back

They can still go well south and, if necessary, around the house. Only the trailer is supposed to go through the garage.

But as I’m writing this... one possibility would of course also be to put the trailer on the north side behind the house. There would be enough space. Just a bit inconvenient to push...

Before you plan a fresh pious cheerful free 20 meters of border construction, you should first clarify how many meters you are allowed to build on the border.

The usual 15 meters total, 9 per border as far as I know. In this variant, that fits exactly (trailer without a fixed roof). But squeezing it in at the corner is currently on the edge, so it may be that we get away with significantly less.