I have a huge stack of old medium format negatives, I want to somewhat automate the scan (there are 1000 or so!) I'm wondering if there are any medium format scanners have some sort or automated feed.
Yes, the minilab scanners do (such as Fuji Frontier and Noritsu). An older one with acceptable resolution and speed can be had for around 3k. There are online vendors specialized in recycling and reselling these machines (see here).
I haven't heard of any consumer level scanner with this feature. But even if there is, it doesn't solve much of a problem for you, because each 120 film contains only a few shots, after which you will have to reload the scanner.
Instead of that you can get a high end desktop scanner that takes two strips of MF film and buy an additional film holder as well. Then you can load one holder while the other one is in the scanner. So, you will load the scanner twice for each 120 film roll. This is only twice the loading effort that would be needed with a completely automatic system with roll feeder!