Driveway stones from Kann in light gray

We need a gutter at the property boundary, the first ones are already allowed to dismantle it because it was checked and criticized. There should also be a slope, during heavy rain it never and never infiltrates quickly enough even with permeable pavement. Just not 5%...

We took the cheap drainage concrete paving stone from Hornbach for €19 / m².
In that respect, €47 / m² for the Kann stones would also be much too expensive for me.

Here, everything soaks away quickly even after days of continuous rain (we haven't had any real heavy rain here for two years), but I'm talking about several days with >=10l/m². At the lowest point, a puddle forms, which, however, disappears relatively quickly after the rain.
As you can see, we also have a green strip on the side of the driveway. The slope goes very slightly (0.5%?) in that direction, so if there really were a heavy rain event, I hope a lot can soak away there. I'll see what happens.

Since we only laid the paving about a year ago, I can't say much about its durability yet.
Here you can see how it was about half finished:
https://www.hausbau-forum.de/threads/lage-stadtvilla-oder-einfamilienhaus-auf-500-m2-grundstueck-rechteck.33505/post-646779

Where it is dark, we just sprayed dirt away with water. However, there are actually some stones that have less color or where the color has already faded again. But we quite like that because such a large gray area also looks blocky and oppressive.
That is about 50m² finished. With 80m² and if I had the money, I would probably rather work with different colors or a stone in shell limestone look or something like that to loosen up the area a bit...

The labor costs seem a bit high to me, but that might be normal by now because labor costs have usually increased in the last 18-24 months.
The question here would be: is that including the sub-base?
And also: how is the sub-base planned? How far to excavate, how thick is the gravel, and then a grit bed or sand?
In my opinion, gravel is also too expensive; I know prices around €20 per ton and this was already named as too expensive here.

The question is whether that is the price for "Schotter liefern" or "Schotter liefern, einbauen und verdichten".

Is the question whether that is the price for "delivering gravel" or "delivering, installing and compacting gravel."

The price for ' RCL 0-32mm delivering, installing and compacting' Is that then not rather cheap after all?

If I remember correctly, I paid around 500 EUR for delivering, installing, and compacting 17.5 tons of recycled crushed stone, about 28 EUR/t, half a year ago.