Wow, that would be a horrible idea.  A huge price for an outdated computer with "mining" in the title. 

As others have suggested, build your own rig.  Maybe even find used gear to start as a lower price point (lower ROI).  I'd really suggest you start small.  Start with 2, 3, or 4 cards.  Keep your costs down, learn how to build a rig, get it setup, and keep it running. 

When we started mining we started with an old computer and 2 cards we found cheap on craigslist (cost us 45.00 for the computer and 100.00 each for 2 970s).  From there we purchased risers and added a 3rd and 4th card.  When this was running solid we decided we were happy with mining and began to expand buying our first "mining" board, risers, cpu, psu, ect.. and set up our 1st actual rig (moving the 4 cards to the rig and putting 2 new ones back in the old computer).  We steadily picked up cheap cards and kept filling in cards where we could.  This whole time we never plunked down 1k or 2k with the hope of leaning how to mine and what to do.  We learned as we went, investing more and more as we made more and more, and that has never stopped (now up to 4 rigs with 6 cards in each). 

At any point and time we could have easily stopped mining and lost little-none because we didn't just try to "buy" our way into mining vs taking the time to learn how to mine.

I think starting smaller will make you a better miner and keep the wife happy.