It sounds badass is what it sounds like.
If you know what you're doing, go for it. I assume if you know how to use a reballing station, you should be pretty good?
Would be pretty sweet to get it up to 8GB + 1TB SSD. Though I doubt cheap by any means.
However, I doubt the CPU would be able to be upgraded easily. I mean, the potential upgrade for that slot seems like it wouldn't be worth the cost, effort, and extra heat.