Construction costs are currently skyrocketing

This is all indirectly related to construction costs... With energy, it is even somewhat obvious.

Construction costs:

Electricity connection: €2450
Telecom fiber optic connection: €800

Let's see what water and sewage will cost...

For us, the total development costs were about €8300 including a 5000L cistern, rainwater infiltration, electricity, water, sewage connection, fiber optic + well flushing)

Our total development costs were about €8300
Including 5000L cistern, rainwater infiltration, electricity, water, sewage connection, fiber optic + well flushing)

Okay wow, our 4.7m3 cistern alone costs €5400 net. :(

Okay wow, our 4.7m3 cistern alone costs €5400 net. :(

Really? Wow.. Ours was about €1200 gross - 10% discount, including delivery. The municipality covered €750 of that as a subsidy. What kind did you get that is about 5 times as expensive? Bomb-proof?!

Simple chess rings will do here as well...

Simple manhole rings work here too...

Yes, BUT: Leakage risk with manhole ring cistern: Improperly installed manhole ring cisterns can develop leaks. Some of these only occur after several years. During installation, it must be ensured that the concrete rings are exactly aligned and properly sealed. AND that, in turn, requires additional labor hours! In terms of price, plastic and concrete are similar.