Is a weekend house from Tchibo for 50,000 euros worth it?

In the information brochure, the bathroom is only accessible via the terrace. If that is the level of planning, then the construction will surely be a pleasure as well.

The quality of a plan depends on the requirements. It may be that it does not meet your requirements. That does not mean the planning is bad. In a vacation home, having an outdoor access for washing can have advantages, especially when I think about how much sand and dirt children and dogs can carry into the house after playing. Especially if such a cabin is located near the beach and only occupied occasionally, I would prefer this solution to one with an interior door.

I don't know. That kind of campsite feeling when you have to go to the toilet at night or go back and forth between the bathroom and the bedroom in the morning? In wind and weather? That's really unusual.

I had also looked at the floor plans.

Whether the bathroom and outside access, etc., are good or bad depends on the answer to the question

What purpose do you have in mind for the house?

that I already asked in post 2. But he hasn’t checked back here since asking the question.

a turnkey weekend house for 50,000 euros

I think this has - somehow - resolved itself for him once he sees the expensive faux pas of the turnkey term corrected.