The birch trees will be coppiced to feed goats. I was thinking about pollarding them, but I'll look into coppice as well, since they will have no taproot. This is something to think about in the future.
The apricot tree gets NO care, this is the best way I know of at the present to get a start of the parent. It might be best to start seeds from the same tree and see which performs better in the same location. I'm thinking 10 years for a good trial.