Hi Dutch Oma,
Welterusten for now 
If you also would consider a smaller knitting project, somewhere along the line, I have a few balls of yarn out of which my Oma started knitting a cardigan for my dd before she was born.
She had dementia and kept on starting again as she made mistakes, used to knit all her life up until then.
The dementia got worse and she passed away 2 years ago sadly.
I have the yarn as was hoping to be able to knit something out of the yarn she started with, for my little girl, but haven't got the skills.
If you would be willing to knit a cardigan out of it I would be very grateful.
You said you are looking for a big project, so no worries if not, but thought it wouldn't hurt to ask 
I don't have the pattern she used, and doubt there is enough yarn as my daughter is now 4, but would of course be happy to find a pattern of a similar one, and more yarn