Item #2 is in the planning stage. My freeware cross-stitch planning program does not do quite what I need it to do here, so now I need to decide whether to find a better program or just do it by hand. I'm thinking by hand. Hm, yeah, then I can just get the bit that doesn't need reference photos sorted out on the train.
Item #3 is in the concept stage. I have some sketches, but I need to do a fair bit of prototyping to see if the first idea is going to work.