3DS Max isn’t CAD. Whoever told you you that you need a prosumer card for making assets for a game like Star Citizen does not know what they are talking about. A lot of the tiny details in Star Citizen are just planes with a screw texture on them, which get added in at the very end. Really for game art, you can get away with a $150 gaming GPU. I know plenty of game artists running older hardware on their PCs at home, because they don’t need a GTX 1080 to make assets. The only real bottlenecks to worry about is, making sure the GPU has enough VRAM for their workflow and the game.
Again, the only people that need Quadro or Workstation GPUs, are the ones that KNOW they need one, they are for very specific tasks. Game developers do NOT use workstation GPUs.