Cost to install a level shower?

Good day,

we have bought a house and want to renovate the bathroom. Remove the old shower, install a new walk-in shower. I went to Hornbach over the weekend and asked about the installation costs. For materials, we ended up at around €1300. Unfortunately, Hornbach does not do the installation. The employee could not tell me anything about the costs.

We could remove the old shower ourselves and chip off the tiles. I don't trust myself to do more than that. What did you pay for the installation?

I would appreciate a few answers.

I would say, you can’t really say that in such general terms. The question is, what does it look like in the shower, is the slope sufficient for a walk-in shower or does it need to be a bit higher...