Getting something decent that can probably run BCoF on low-med isn't that expensive. A new, $300 laptop should do the trick, which is really cheap for a "gaming" computer/laptop. Or if you have desktop PC, get something like a GTX 950, it's around $150 and if your CPU is not too shabby, you should be good to go. You really don't state of the art $1000 technology, but a little upgrade is gonna be necessary by now.
That said, I can't look into your purse and it's easy talking for me about upgrading your PC when you just ordered a brand new GTX 970....