Like others have said, for a thousand dollars you can get a ton of stuff. For comparison my latest bud cost me around $200 and has about 6tb of raw storage. It runs proxmox and is paired with a mini PC I bought when I first started. I have btrfs raid for the system and then a separate controller for a TrueNAS VM. It even has a bluray drive that I picked up second hand and a RX590 that had to be cut down to fit in the case.
$1000 dollars can buy you a mini data center with used hardware. I honestly don’t know what to recommend but what ever you do make sure its flexible down the road so you aren’t locked into stuff from the past. I would go for a beefier CPU with good cooling and plenty of pcie. Just a note Intel CPUs work better for video encoding.