Unless you need to actually use it in a rough environment, something like the Seek imager is a far better choice. Three times the thermal resolution at 2/3 the price.
One of my requirements, I probably should've mentioned, is that the unit had to run standalone -- no smartphone app. I've got enough useless e-waste in my closet that requires the obsolete 30-pin iPhone connector or whose abandoned app has long vanished from the app store.
USB isn't likely to go anywhere. I bought my Seek Compact four or five years ago and all it took was a two dollar micro-usb to type-c adapter to keep it running on my newer phones.
https://www.amazon.com/Seek-Thermal-Compact-All-Purpose-Micr...
Non-starter for me.
FYI. You can just buy FLIR thermal sensors directly and throw them onto a board then use that as a webcam. There's a whole company dedicated to that: https://groupgets.com/manufacturers/getlab
This is awesome. Being able to mix and match the parts/boards to get what you want and all with a standard webcam output.
Brilliant.
The EEVBlog Thermal Forum is a great place to learn more. There are some deep wizards over there, some great comparison threads, etc.