If you're doing high-volume work, M-F 9-5 type stuff(like for a museum or large collection) I can see where the DTcam cuts down on time, which is generally the most expensive part of the solution in the long run
However, if you're doing "periodic" work, and only a few scans during a scanning session, I feel the drum scanner is probably the more appropriate tool.
Get a quote for a DTcam solution with a 60-80mp digital back and the best lens(es), I'm sure you can buy a well-serviced drum scanner, and probably pay for 2-3 decades of service/parts(if needed, due to sporadic use) and still have some cash left over for more film
Sheet film is flexible, doesn't require batteries(which seem to run out at the most inopportune times, at least for me), and you already know how to bend it to get what you want(hopefully).
OP, tally up what your "needs" are, and what your "wants" are. Then do a cost analysis based on your workflow. See if spending the cash for a high-end solution like the DTcam makes fiscal sense for your workflow.
best of luck, from a fellow sheet film user(5x7/4x5)
-Dan