Would you rather buy a rig or rent them out on AWS or some other cloud provider?
What if it came pre-bundled with all the software and drivers you need to quickly get going?
AFAICT, hobbyists with deep pockets; freelancers or small boutique shops doing consulting in ML, AI or 3D graphics; research labs with good funding in these domains will be the key market for such rigs.
I have got my rigs from: https://www.scan.co.uk/3xs/custom/cad-graphics-workstations