@ussnorway
I am not at all against Steam, but that's stuff for another discussion. So, I actually want to keep using Steam. And I do know about Hybrid drives, actually a Hybrid Drive is nothing more than a LVG inside a drive. As I said, my knowledge of Windows isn't that profound, what mostly means I haven't used PowerShell at all and cmd just for basic operations, yet on other systems I have worked with LVG. One of the most common Hybrid Drives is Fusion Drive in Apple computer on which Windows can be installed and run. Therefore, I can positively say, it shouldn't be any problem to format a LVG to NTFS. In addition to that, I can also confirm there are actually two hard drives build-in by using 'sudo diskutil coreutils list' command. There might be an underline in coreutils, but anyway, therefore it is possible. On my debian system I have already grouped two HD's together with LVG. That wasn't an issue either. The only problem is, how to do that on Windows.
Oh, and yes. You're absolutely correct, a SSD has a much shorter life time than any magnetic drive. Basically because the number of times you can delete a block in a SSD is limited. And if one of the two drive fails all data is pretty much lost. Well, the other drive is salvagable, but that's a lot of trouble and a backup on an external HD would be the better alternative.
So, for the life time of the SSD issue, as long as I avoid using of a journaled file system, life time should be alright. Recent test trials also showed that SSDs manage almost twice as much erasing circles as anticipated and advertised by manufactorers. Guess manufactorers are cautious with the numbers.
Buying a new drive would also defeat the purpose that is:
Improving my setup by improvising and having fun doing so. Simply buy a solution sounds like a cheap way out. Okay, maybe not cheap.. But you know what I mean.
-TheCommoner