So a bricklayer isn’t stupid. Moving a window x cm further to the right or left, they couldn’t care less. [...] And of course the roller shutters move with it.
Did you have your own words in mind there:
Take another look at the exterior view,
that it can’t be moved because of the gable and the proximity to the roof..
I took a close look at the exterior view and came to the conclusion: a) a 62.5 cm shift (for the bedroom and children’s room, each towards the roof edge) should be possible; b) however, the inspection flap of the roller shutter could then already abut the finished roof soffit at one corner. Therefore, the option
One could also simply make the bedroom window narrower.
might be "the solution" in combination – I’m thinking about 25 cm narrower.
Absolutely nothing may be changed afterwards..
Which god says that – the Prime Minister personally? – Revisions are always possible. And this is a perfectly usual one; for the pros, this can’t be a first.