Lyn - it sounds like you have been putting lots of thought into this!! That's nice!! For me I have replanted plants several times, for different reasons and they adjust just fine if they're in the "right" spot! Keep observing and figuring!
Not sure if you know the id's of the plants in the photos but the yellowie ground cover looks like 'Angelina' which is a pretty happy plant where ever it is!! I'd guess the rock with the brick surrounding it would work - for the first couple of weeks after transplanting you probably will have to water more often to let it get established, then it should be okay with just a couple times per week of watering! You can take clippings of this plant very easily to spread it around!!
