I don’t know if I have any additional tips on top of the ones you noted, other than to do it in layers (since most of these need two coats – the red needed like 4 coats). You can see from some of the photos how we did the color layers. And then we’d work on an opposite wall while one wall was drying. We did sketch out the whole room beforehand so that we could get the spacing of the characters and the scale of each one. One tip is to take photos of the room (the walls) and then print them out (not using glossy photo paper, but something matted), and then sketch directly on the photos of the walls to help plan out the layout.

As for finding time with a two-year-old in tow, I don’t have any great ideas. This is our first child, so we didn’t have to be opportunistic with naps. Our son is about a year and a half now, so I understand that painting with somebody who gets into everything would be a major challenge. Good luck. I hope the room turns out great!