The layout is coming along nicely. One note of caution about the unopened roll of wire you have pictured. The brand name on it indicates it may be CCA (copper clad aluminum). It is typically less expensive than pure copper, but is not recommended for train wiring.
While I don't personally have experience using CCA wire, GunRunnerJohn strongly recommends against using it. If it's unopened, you may still be able to return it and find something else more suitable. There are lots of other good choices.
