Trench infiltration - what are the costs?

Hello everyone, can someone please tell me how much a [Rigolenversickerung] will cost. We have commissioned a hydrogeological report. Result: roof area 176m² We are supposed to have 2 pipe [Rigolen] installed at a depth of 1.5m, each 12m long, spaced 2m apart. The pipe [Rigolen] are to be laid on a gravel bed with filter fleece. Thank you very much.

Do it yourself or have it done?
Doing it yourself is between 500-1000€.
Having it done always depends on whether you find someone who does such "small stuff" for a fair price. Or do you have a general contractor (GU) who should do it?
We paid about 3500 for 40 m of pipe in the garden, 2-1.5 m deep, so you might be at 2-3000.

I had an (expensive) offer here that we did not accept: - 3600 gross: "21 pieces 80x80x35 trench" gross with excavation, installation, etc. - 3200 gross: "80 meters KG pipe DN 150, construction of pipe trench"

Excl. disposal, fill sand.

We are now infiltrating via two concrete shafts, as this is permissible here and significantly cheaper.

We paid roughly the same, about €3000+, for our two Rigolen.