Should I get a laptop or Make a desktop?

I am a gamer So i want to play the latest games at a decent setting but I got to my mothers house every weekend and desktops are kinda hard to lug back and forth. So if you know a laptop that can run most modern games with 30fps or higher. I have a 1200$ budget. Also if you know of a way to allow me to easily carry a desktop to one house to another that would be great.