The small details will probably be interesting, things that you might not even have on your radar yet.
A terrace and carport/driveway are enough for you - that won’t cost much? Ok, but what about the mentioned splash guard, the entrance porch, and what kind of ground will you have from the carport to the front door? Soil or rather paving?
Are all sealing and cutting work already included with the tiler? Decorative stuff like, for example, a tile border is usually not included in the tile price. Are finishing strips/edge protection strips not listed either? Baseboards cost quite a lot if I remember correctly, are they cut from regular tiles (instead of bought ready-made), and what does the cutting cost? Do you even find tiles in that price range?
What you urgently need to be aware of: with 15 different trades, even average extra costs of €500 add up. And unfortunately, it often doesn’t stay at just €500 more.