Probably spend $4000 - $5000 to get 8TB/day of plotting capacity. Requires lots of ram, high-core CPU’s, and several 2TB NVME ssd’s. Those PCIE adapters that can take 4x m.2’s look good if you can find any, but just grab anything you can that accepts m.2 nvme!
And then spend the remaining $15000 on storage. Get as many 6TB and 8TB drives in the short term so your plotting can be stored on something, and also order as many 14TB, 16TB, and 18TB drives as you can afford and hope they arrive before all the 6TB / 8TB drives are full !
(I would order the 14TB / 16TB / 18TB drives immediately and pray they arrive in 3-4 weeks).
Look for motherboards with LOTS of SATA ports (data AND power!)
There is an empty 50-bay (3.5 inch!) chenbro JBOD chassis in my area on craigslist that I’m very curious about. If you know how to run enterprise kit like that it will probably simplify your operation if you can acquire some. For me though there’s too much I don’t know about that kind of equipment, I’m pretty sceptical that it might require lots of missing parts - doesn’t even have drive trays. Here’s the craigslist ad (Vancouver, BC, Canada): Chenbro 9U 50-bay Storage Center Server Chassis RM91250 with 2 Xeon...