2 grand? I am going to take it that you are an American. I suggest looking on Newegg or Amazon. BestBuy has always been over priced. Of course if you want to support Brick and Mortar than you can. I have been in BestBuy before and their selection of laptops is really small and I don't remember seeing any high end gaming laptops or desktops when I was in there.
Laptops generally don't do well with gaming. Gaming causes a lot of heat build up and heat is bad for laptops. Normally I would suggest building a desktop yourself or at least buying a prebuilt desktop with gaming in mind. But building your own is always the best option if you can do it. But given the situation you are in with deployment I would suggest making sure you get a good laptop. Something that can handle the heat that this game will cause.
They are bit expensive but you said your budget was 2,000 so I guess you can go a little bit over. I suggest going here if you can afford it.
https://www.falcon-nw.com/laptops/overview
Also when you get back home I suggest looking into getting a good desktop, either build one, have someone help you or buy a prebuilt gaming desktop.