How do you feel like this?
It takes SATA from the mobo and converts to eSATA, powered…
I would have no hesitation to try something like that out.
Do you know if eSATA provides enough power for 3 1/2 HDDs or is it only suitable for SSDs and laptop drives? (If I wasn’t such a lazy bastage I’d look it up. 
)
The power situation is a touch dubious, but in terms of connectivity cheap eSATA is perfectly fine. (The power might also be fine, I just don’t actually know off the top of my head either how much power you can pull from a PCIe slot, or how reliable it is in the face of potential load surges from connected hardware.)
Typically, I’d recommend some sort of JBOD chassis with its own proper power supply for this kind of thing. But I’d say this is, at the worst, “worth investigating to find out how reliable it is” if that helps! 
I’m not sure how does the spec say about powered eSATA, but the wires on this looks like it’s just the PSU supplying it.
Look closer and you’ll notice it does not connect to any PCIe slot, it pulls power from PSU SATA connector. The PCB is simply copper in copper out I believe; I’m not familiar with electronics so I can’t tell capacity of this board, but my intuition says it probably should be fine.
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Ahhhh, in that case yeah I have no real concerns about that kit. Looks fine from here!
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