So I am looking for a neat train set to put under my tree but since I am sort of a history buff  and I like things related to the history where I live near, I chose the Union Pacific RR. My plan is to have something that will give me the idea that I am looking at a passenger train chugging through a light snow covered evening in the Sierra Mountains in the town of Truckee near Lake Tahoe CA. Thats the feeling I want to have when I get the right train and passenger cars to put under my tree. I am tring to find out the best way to set myself up with the most historically accurate train set  that mimics the Overland Flyer/Limited (Union Pacific) between the years of 1890-1906 with the correct types of cars and steam engine they would have used on a good weather but light snow condition in the Sierra Mountains. I've done some extensive research on what the train and cars might have looked like. My guess is that the train and cars would have been much like the 'O' gauge 'Williams #00325 The Greyhound Starter Set' this would be my cheapest best route but the problem is that the passenger cars wouldn't have been the two tone grey which wouldn't have come out until 1946. The Pullman Heavy Cars would have also been made out of wood. I figure I may have to buy other olive green unrelated wooden Pullmans that have other names on it, strip the names and rename it to the accurate logos and names of the time. I have pictures of two Steam Engines that I see where used such as the Black, 'Baldwin 4-6-0 steam locomotive', a 'Mike 2-8-2', or the 'Prairie 2-6-2'. Any advice tips, sets, ideas, best cheapest price sets either 'O' or 'HO' will help me and where I can find them with the best price. Thank you!