DSLR is the most flexible way, cost wise. You’ll likely have a DSLR already if you’re a film photographer, and You can get a decent scanning setup for under $200. Being able to edit RAW files is also more flexible. It’s a lot more fiddly though so not ideal for high volume work.
Don't count out the flatbeds. I don't have the space (or the patience) for a DSLR rig, and I've been quite happy with the output from my Epson V800. I bought mine used for $700 or thereabouts. For the amount of time it's saved me, the added cost over a DSLR and bellows/macro lens was worthwhile.
