So... I finally went nicehash after struggling to get Ethereum wallet to update it's node for ages.
Now that I see I can make $3 a day with my R9 290, I figured I could make double that for the same power draw if I get a GTX 1080 Ti

Not the best for mining, but it would scratch my gaming itch as well as pay for itself in 6-ish months?
Also, I could run both that and my R9 290. Again, not ideal, but I would still make a small profit (My Corsair HX850 should cope). How's my reasoning so far?
At the moment I have no desire to go full Thor and spend my life savings on a rig.