Yeah I got a spontanious idea
how about that:

there are places all over the maps where you're able to buy some land to built your own houses or shops to get some more money besides.

but that was just a quick idea.

Otherthen I think that this looks really cool from what the screens show though in picture 4 I cant really see that it's sand maybe add some sand-dunes

Regards and well progress

Aztec