Hey @Jesse_Cohen welcome to the community and thanks for posting.
I’ve seen other community members hosting iframe ‘wrapper’ pages on devices on the network (eg. a NAS or Raspberry Pi), but I’ll leave it open to the community for their feedback.
There is a feature request for iframes that has been gaining some traction - you can cast a vote for it here:
Embed Web page from 3rd-party site into dashboard (iframe or otherwise)
If you have a particular use case for having iframes within a dashboard, please feel free to share them in the thread linked above. 