I have USB-C adapters on everything so I end up with the reverse problem now of occasionally having to pull them off to plug in to a USB-A port. A few of those adapters will save you that hassle if you go the full conversion route.
And for commodity items like this, always check both eBay and Amazon. If you see an item that appears to look like the same item from one seller, but is considerably more expensive, there's a chance that you'd just be paying someone to drop ship the product from the very same cheaper seller to you. There are middlemen galore for stuff like this who are doing nothing but marking up an item and placing an order on your behalf.
Hmmm, yup you're right. Those particular adapters will block the adjacent port and I never noticed that because I already have enough peripherals that are USB-C that I never need to try to fit two adapters side by side. A regular USB-C plug will fit just fine next to just about any USB-A to USB-C adapter.