No problem! We all started out somewhere, and these forums are great places for those of us who have been around the block a few times to try to pay it forward for all the advice we were given back in the day.
Honestly, when I started that post I was thinking that “real” RAID cards were still starting at around $400 - even then they made sense. I did a quick check and found that Avago/LSI (now Broadcom - that company has changed hands a few times) model for $130 and did a double-take and then carefully checked the specs. It seems to be legit… low-end, but legit. And from a premium brand. To me $130 is a no-brainer. Buy a spare if you feel the need.
Do watch out for the “cheeze-tech” brands like Highpoint and some of the others that are $30-$100. These are basically the same software nonsense that’s on the motherboard, baked into a PCI card. They don’t really add any value. $130 for a legit Avago/LSI/Broadcom card is an amazing price point, at least to a grey-beard like me.
It’s pretty straightfoward to use a spare drive and migrate your existing installation to hardware RAID if you’re so inclined.