That might produce more than you rmining rigs and cost you less to produce, however, this is classed as hacking and social hacking through the use of this. And the two are illegal, you could always as a trusted friend/family member if they have cheaper electricity, or know a person who is living in n apartment or studying at university that has "unlimited free power" in their rent tarriff.
Why offer such a bad suggestion? I know your joking.. but seriously I would think twice before typing some things.
But the truth still is with 200 euro budget there is not a ton of miners in that range. S3 chances are newest he is going to get And being in Europe possibly VAT/Import tax. So not cheap. Really do need cheap electricity to make sense.
And if I ever manage to find a block with the solo mining rig, I'd have a huge ROI. Chances are very slim but you never know...
I can still use an S3 to mine in a pool, like I mentioned before.