Tiger!
Great to see what you've been up to-very nicely done, again, like I wrote, way back in '13. Can't wait to see your next expansion. Starting small and expanding, I've decided at this point, is the way to go(unlike what I've done in the past, or currently-with starting large, and having nothing complete, running or finished for what has seemed a very long time in my case). How long have you been 'in the hobby?' However you came to this point in terms of the level your scenery, and layout design, should be thanked, or complimented vigorously. If you 'did your own homework,' and learned it on your own, I'd be interested to know which sources you used, or found useful, as I've been 'in the hobby' for 40ish years, and none of my scenery has ever looked as complete as yours, fwiw.
My hats off to you!
Goes to show people that you don't need 100' x 100' to have a very good, well done layout. Longer runs can be fun, but large layouts take a long time to complete and a lot of maintenance, which if you're not independently wealthy, or retired, etc, can take a lot of time, which a lot of people don't have.
Keep on posting, and those photos (or videos) coming! Very inspiring/motivational!