2000$ Budget, need a gaming PC that will last

Basically what the title says. I have a budget of $2000 USD, and I want a really good gaming PC. Specifically one that will be good enough to last a few years. I recently enlisted in the US Marine Corps, so I won't be able to play it too often. I know very little about building PCs, but I know that a SSD would be best for the kind of games I play.