I concur with rtr12. The Z4000 and 1 TIU (2 channels) will be fine. The Z1000 is only a 100watts. The brick is perfect for accessory power as it has the 14v fixed output.
The yard will run fine connected to the blue or B loop.
Do you know how to turn off the elevations being displayed on the track joints? That's why I didn't block that run.
I worked on the block a little more. if you use a 5" + a 5" Block in place of a 10" at around 4.25" you'll get 10 blocks for loop A. There are 10 for loop B.
That's leaves 2 pair of terminals on each distribution board for add-ons if needed.