Rainwater must be obligatorily infiltrated

I had a deep well drilled through an acquaintance.

Nice for you. Unfortunately, we live in a water protection area, so drilling a well is out of the question. It doesn't always have to be immediately "economical," but it helps us and we meet the conditions set by our city. And yes, it probably looked something like that for us too. Only our little house was already standing, and unfortunately, I couldn't take a picture from above... ;)

I always wonder if it's economically worthwhile.

Compared to a well, I don't know. Compared to tap water, definitely, since you usually have fresh water = wastewater, and you don't have to process water for the garden extensively. And with the cistern, you also save a few euros on rainwater.

For us personally, it is certainly more worthwhile than the well since the development plan requires a 3.5 cbm retention cistern. You might as well make the hole a bit bigger and not just bury air.

Definitely compared to tap water since usually fresh water = wastewater, and you don't have to treat water for the garden in a complicated way.

Not really, if you install appropriate meters for garden water and don't pay wastewater charges.
Cost-wise, this relativizes the whole thing, and you can water quite a bit before the costs for the cistern pay off (actually never!?).

And with the cistern, you also save a few euros on stormwater.

At least in many municipalities, a cistern does not replace a soakaway, so the latter still has to be built additionally!

Fortunately, our community refrained from that. The permeable paving is already an imposition enough, as the subsoil infiltrates water two orders of magnitude worse than the paving laid on top of it.

I had a deep well drilled through an acquaintance.

How much did the drilling cost you? Was it more or less done by yourself? Or with heavy equipment?

What did the drilling cost you? Was that more or less done by yourself? Or with heavy machinery?

I wanted drinking water quality; here, at 13m depth there is a coal layer, after that comes iron- and manganese-containing water. 5" pipe 12.5m with filter, pump and everything 1500€, construction water would have already cost me 650, so I had a well drilled right away. Heavy machinery—yes and no, but without proper tools you can't make a hole like that; it would always collapse again. Tractor, 8m3 water, proper pump and the frame for drilling.