There's no shortcuts or easy answers with this one.
We've had a couple of long threads on this one and I suggested photographing the slides with a remote and a very good screen. Not bad results, and about one every two seconds!
My Epson 3170 is not bad, but really, the setting up and positioning of the slides is very time-consuming. ( I had a better model Epson, but the slide holder looked like a pennyworth strip of plastic - like the bits left over when you've made a model aircraft.) I took it back.
The problem with the dedicated 35mm devices - apart from the cost - is the plodding slowness. The results are less than startling.
It's the stunning realism of projected 35mm slides that made me think of snapping them.