Main bathroom (10 sqm) with open shower, any ideas?

Just ask. Part of the amount they want to charge is for answering your questions

Alternatively: Just talk directly to the plumber. Maybe there is still a possibility for him.

A natural stone countertop basin, but actually for 600 EUR...

For the bathtub, we actually wanted to stick with steel enamel.


Yes, I will do that, I’m curious.

With the bathtub, we actually wanted to stick with steel enamel.

For what reason? I would prefer to go for a well-functioning solution with an acrylic corner bathtub rather than being forced into a compromise with a straight steel bathtub.

Why even a shower tray? I would take a floor-level shower. And I would replace the glass wall with a masonry one.

Why a shower tray at all? I would opt for a walk-in shower.

I agree with that. But I think the OP is "afraid" of the extra costs. But here too: questions, questions, questions.

And I would replace the glass wall with a built wall.

That depends on the lighting conditions and the width of the passage. With a built wall directly next to the door, you will probably get the impression of going through a tunnel at first.
We had a similar setup in our apartment (somewhat smaller) and also implemented it with a glass wall. Of course, that is significantly more demanding to clean than a tiled wall.

We got our corner bathtub (150x150 in acrylic) for 600€, but since we are also doing the bathroom ourselves (except for tiling), that was not a problem. The problem is that most of the plumbers understandably have a hard time with materials that are sourced by yourself.

However, we really wanted a corner bathtub because we simply like the look of it. But sometimes the prices are really outrageous already at the suppliers. There was hardly anything available under 1,000€, stylish bathtubs were sometimes priced at 3 to 6 times that amount.