100-150€ old macro lens
20€ adapter
600-1500€ camera (fuji or sony aps-c, preowned or even new, something like that)
150€ copy stand (50-60€ if diy)
40-200€ film holder
100€ light source
If one already has a camera, and lots of people interested in photography tend to have it, the setup is quite affordable. Or, better: i don't think a teenager suddenly goes like "mh, photography is interesting, let me try it with additional steps of madness", i would think most of the times one starts with digital photography and then continues with analog.
It takes the same space on the desktop as a traditional epson scanner but it can be disassembled easily. It's quicker than a scanner, or at least it's quicker the acquisition procedure (after that you can put the negative and hardware away and work on your negatives when and where you like, with a scanner you have a variable dead time before changing frames where you need to be around). You don't need to work with veeeery fiddly software (i've only used epson pro and it seems like a bad software from 1998).
I don't know about quality because zooming on files is the most boring thing ever, but i can see why dslr scanning is gaining traction against buying an 800€ slow and big piece of furniture.