Yes that DS30 folder is a mixed bag and doesn't resemble the folder in that other thread.
The readme file reveals an install script for the terminal, but unsure it would work in Solus.
Hang in there, epson scanners are a popular thread and someone will chime in clearer than I.
I apologize as I did not mean to present myself as a 'linux person' and engage in any insincere way. I'm pretty much a linux-illiterate "average person" in many ways (who has installed a printer or two), so I don't believe I patronized you in the least. Sorry if that's how it appeared to you.