Hi,

1] Your daughter is sweeter than any thing on earth. I know, since I have a daughter too, (she is grown now). I wish her and all your family the best of everything.

2] Instead of over burdening your RPI, I would recommend Luxonis OAK-D Lite.

It is like adding a stereo vision in nearly fire and forget style with additional 4TOPS TPU.

It is not as cheap as Coral D +Camera but it has, ..., hard to tell in a comment, but take a look yourself :

https://docs.luxonis.com/projects/hardware/en/latest/pages/DM9095/

3] Btw. Great work! Congratulations. Also celebrating the patience of your wife.