For a total of 170$ you could have :
Full windows pc that uses 5-6w
Powered usb hub with a dc 5v usb cable
Battery backup 14$
20w Solar panel
Now for 25$ each you can get 9gh/s at 3.1w, you should be able to easily run 3 of these without any power constraints.
So this may sound nuts but buying any miner would just be throwing money away and with this set up you have many things you could reuse for other projects and you could stake off the grid making money on POS coins.
Unless he's just wanting to throw away money he should stick to like compacs if he is wanting to mess with gear. Anything big just will never work out. Compacs use so little he could play with one for cheap.
But on really mining he would have to look into hosting or cloud. As it will be less then 1/5th of his electricity which is crazy but most will beat it by a lot on price.
I would suggest using a RPI with it, it can be ran at much lower costs. And a powered hub for 1 or 2 is not expensive.
He just will not be able to home or hobby mine. He is to high on electricity. His only option left is mining for fun which the compac does for cheap. And he can always reuse the RPI down the road for another project if board.