Well, I don't mean to offend you at all. But to "compare" with costs of more than 25,000 euros for the outdoor facilities, your example is rather unsuitable.
Back then we once calculated how much money we would have needed to do everything ourselves, and since we had neither the machines nor the appropriate equity prices, we had everything done…. In addition, it would have taken us 6 years or whatever for the same thing.
That's why the whole thing mainly depends on the property... ours slopes 2 meters over 30 meters, the path to the front door alone is 15 m, etc.… That's what makes it expensive. The neighbor diagonally across has an almost flat property with a north entrance. He saves a lot of paving, the filling to the street, and can do everything himself without many machines.
I didn't want to compare myself with anything.
Of course, you can't do everything yourself, and as you say, it depends on the property. Ours is quite flat; over 14 m it slopes about 15 cm.
But you can do quite a bit if you want.
With a sloped property, you can also have the basic work done and do the rest yourself.
I made the breakdown to show that you don't necessarily have to spend a high five-figure amount on outdoor facilities if you don't have it or want to spend the money on something else.
If someone wants to have it done, they should do so.
By the way, the path in front of our house is also 14 m long. For that, you need a mixer and a plate compactor. You can rent them.
We took about 8 weeks for it, but we didn't work on it every day.