I see that you've ignored my posts, @IMBCRound2 which you're perfectly entitled to, but since I appear to be the only person on this thread with direct experience of being the child in a family on the spectrum of the one being proposed by the OP and share commonalities around identity questions with donor conceived children, as yours appear to be, I am a little surprised.
I need to come back to this, not to pick on you, but because I cannot in good conscience let several of the things you have said stand and I was on my phone yesterday.
(I am going to set aside the comments about the single mothers on from various posters on this thread. The scenarios are nothing alike, but I'm not going to debate that point for now.)
Firstly - you say you discuss the donor, but you have outlined a tight mechanism for controlling discussions around it, even proposing the use of intermediaries like therapists and other third parties should the child show an interest in meeting him "for their views." You've spoken about the differences, as you see it, between a 'genetic father' and a real parent. Yes, DC and adopted children can benefit from therapy to process their origins - but no responsible therapist would ever approach it in the way you have outlined. The only person whose views matter here are the child's - your child will decide what the word 'father' means to them and what they are looking for from any relationship, not you, not a therapist, or any other 'third parties' around who (I fear) would be carefully curated to support your view.
You are articulate and I suppose in theory well-meaning? Or at least well-trained to say the right things regarding your child's rights. But none of it comes across as authentic. If you value your child's mental health and your relationship with them, if you do not want to set them up for a cognitive dissonance that can permeate multiple areas of their lives (personally, professionally, you name it) you will take a hard step back and think about how to centre your child's needs in this situation. NOT what social justice goals you might have, rights you might feel you are owed etc. What they need.
Adopters are put through the ringer these days about how the goal of the process is to find parents for children not children for adults. I am not persuaded, when the mask falls, that the same is true for DC children. That is a tragedy.
Also - you must know that one DNA test on a commercial site and your best laid plans will be blown to pieces?