Building a DIY hydraulic concrete mixer with 1000L capacity

We did not film the whole process, but it might give some good or bad ideas to those who also want to build one.
A commercial mixer costs 10,000 EUR for 250L.
We have built this one for 1200 EUR with a capacity of 1300L (900L effective). More than half of the price goes to the hydraulics (motor and hose). Just adding a couple of hours to the process.
Already used for concrete, hempcrete, linencrete and earth-based mix. We can consider it a success.