You could go with an Antminer S5 in which you could purchase 2nd hand of those in this forums computer and hardware section. It requires 590 watts from the wall. The sad thing is, your not going to make much but if you start right away, you could get back your investment just before the halving (assuming you got it for a good price) and anything after that would be profit.
What he could also do would be to buy bitcoins with his local currency, then buy the miner with the bitcoins. This way what the miner would have cost him in fiat money is stable, and he will be able to profit from the price increase that has 99% of chances to happen after or just before the halving.