One thing to consider is whether palm trees go with your intended scenery. Palm trees were popular in California from the early 1900s on, but if you are planning on modeling a state like New Mexico or Arizona, very desert-like, you should think more of cactus than palm trees.
The Heljan station is closer to what is called Mission Revival architecture, inspired by California missions--kind of different from "pueblo" architecture, a native style utilizing adobe and adapted by Spanish, the Mission Revival buildings are largely relatively modern structures (late 19th Century to the present day) and tend to feature things like stucco construction, low-slung tile roofs and arched windows. Many railroad companies built Mission Revival style stations in the Southwest and California, in order to capitalize on the history of the region.
As to building these buildings--yeah, you're probably going to have to scratchbuild a lot. There are commercially available sheets of plastic "ceramic tile" roof material, and the walls are pretty simply made out of plastic. Pick up a book or two on Mission style architecture to get a sense of how the buildings go together and you'll be on your way...
The Heljan station is closer to what is called Mission Revival architecture, inspired by California missions--kind of different from "pueblo" architecture, a native style utilizing adobe and adapted by Spanish, the Mission Revival buildings are largely relatively modern structures (late 19th Century to the present day) and tend to feature things like stucco construction, low-slung tile roofs and arched windows. Many railroad companies built Mission Revival style stations in the Southwest and California, in order to capitalize on the history of the region.
As to building these buildings--yeah, you're probably going to have to scratchbuild a lot. There are commercially available sheets of plastic "ceramic tile" roof material, and the walls are pretty simply made out of plastic. Pick up a book or two on Mission style architecture to get a sense of how the buildings go together and you'll be on your way...