TR seems a good fit for data analyst workstations especially if used with compute GPU(s).
Large possible memory with high bandwidth will work well for extensive data set.
So far the TR motherboard on the market do not offer more than 3 x4 PCI-E slots directly connected to the CPU.
That said the other 4 (x16 or x8) PCI-E slots can be used for SSD board. The cheapest solution is to use PCI-E card extender
that support M.2 D.
TR support a maximum of 7 device directly attached to the CPU (8 if one counts the X399 controller)
So the cheapest solution with extender will enable 7 nvme m.2 SSD. A software based RAID solution should work very well
and enable RAID 1 on 3 pairs of drives.