So my father in law got a new PC and is letting me use his but not letting me keep it. I was planning on changing out the pieces of the PC so at one point everything in it will be mine and I can have my own PC and he can have his back. I do alot of gaming and I have already gotten the GPU. I was wondering what order I should replace the rest of the pieces to make it mine. Or should I just slowly buy all the components and just build my own PC instead of slowly upgrading this current one?