My local Best Buy has only had about two dozen titles on physical media for the past year so not much is changing there. Target in my city has reduced physical discs to a single quad that holds maybe 30 titles, of which only 14 spots actually had any discs last weekend.
I remember the days of spending serious money on new kit every couple of years to build the fastest / best performing PC I could afford and sinking hours into the build and configuration while occasionally running into stuff like this and sinking more hours / days / weeks into troubleshooting...
I don’t have either solution but I figure you can use a desktop PC, Mac, or possibly the Plex app on an ATV4K as a front end gui for streaming from the unit.
Dave Upton did an excellent write up on QNAP a few years back. You can find it here . It’s a self-contained NAS like a Synology. Both are better options that just throwing a bunch of HDDs at a desktop PC if that is what you had in mind.
Usually at least one movie a week from at least one of the stores from 1989 until about 2017-2018 when Hastings closed and my only rental option was RedBox.
My options were Blockbuster, Hastings, Family Video, StarStruck, Crossroads Entertainment (Formerly Adventure Land and then Aardvark Video), Quick Flick, and Movie Mart.
I didn’t go to blockbuster much because of some of their insane store policies (I rented from Hastings Video for over 20 years before they closed), but I still remember renting Starship Troopers on DVD from there when it was first released and they were the only store in town who stocked DVDs.