Can’t figure out why you would use Plex over jellyfin
Probably the biggest reason is that it makes it so easy to securely share across the internet. With JF you're on your own and you can really fuck things up. If you're just running it on your LAN the JF is the obvious choice.
Unfortunately not possible for a new nvidia card (you want CUDA) with 16GB VRAM. You can get them for ~$750 if you're patient. This deal was available for awhile earlier today:
https://us-store.msi.com/Graphics-Cards/NVIDIA-GPU/GeForce-RTX-50-Series/GeForce-RTX-5070-Ti-16G-SHADOW-3X-OC
Or you could try to find a 16GB 4070Ti Super like I got. It runs Deepseek 14B and stuff like Stable Diffusion no problem.