Renovation of children's room - split one window into two windows?

Hi,

I've been thinking for a while about how we can get two equally sized children's rooms here with minimal renovation work and clear costs. This morning it occurred to me that you in this forum generally have a great wealth of experience and are also very creative. So I am hoping for many good ideas.

Attached is a floor plan. The orange lines show one idea of how to renovate it with a lot of effort.

Starting point:
We currently have one (huge) children's room (the lower one) and a small dressing room (the upper one). These are now to become two children's rooms. I should also mention that there used to be three children's rooms, which is why there are three windows and three doors, and it was later converted to the current situation.

So, one partition wall definitely has to go. But how to set the new partition wall?? Either you put it at an angle, but that looks stupid and is also impractical, right? The expensive solution is shown in orange. A new partition wall in the middle. But this means one door has to be closed off, and worse, the middle window would have to be removed and two smaller windows installed. If you completely close the window, the rooms would probably be too dark (north-facing).

So dear forum, any creative ideas? Or can you give me an estimate of how much such a planned renovation would cost? I would guess 4-5k? But I don't have much experience.

Best regards and thanks!

Why not do a "Z"?

How about if you did it this way? Then you could keep the window for one room and use the niche for a desk. In the other room, I would either put the bed or a wardrobe there. I would brick up the door.

Why not do a "Z"?

We probably had the same idea at the same time.

My "Z" would have been the other way around ...

Thank you very much. The concern is that only one window per room will become too dark.

I should also mention, we have ceiling beams, which makes a Z-solution a bit more complicated than with a normal ceiling.

Do you also have an idea of how much your proposal will cost approximately?

You mean it like in the attachment, right? In the lower room, the bed could be placed in the niche.