Offer for the installation of L-stones for slope stabilization

insane sums!

I built my retaining wall by myself.

Bought nice gray hollow blocks, reinforcement steel, mixed the concrete myself because it had to be processed very quickly despite delays

4 days of work for 30 meters cost me and a friend about €2,500. €500 expense allowance for my friend

May I know which hollow blocks you used?

The completely standard ones. You can get 50x25x20 everywhere. Previously, there was a slope. The house was densified, a base plate on it, and then a two-story house. The wall faces the street on two sides. Highest point 1.20 meters. I think we went about 30 cm into the ground. With a shovel and sweat. Borrowed a tamper for compaction. All the chatter from people saying the wall will collapse and blah blah. The neighbor has a 50 cm wooden palisade, and nothing has collapsed after 6 years. Concrete will hold. Okay, the topsoil was sponsored by the neighbor, he landscaped his garden and had an excavator and too much soil. I got him a 100€ food basket

Just as a side note, normally it's 80cm. We do 35cm concrete, 35cm recycling underneath, and the stones then make up the remaining 10cm. It may hold like that too, but no one will offer or take liability for something like that.