This would be awesome to have for RSNA. Do you think you could have a chance to set this up?
In the long term, we will need both cloud and self hosting setup - cloud hosting is very scaleable and lots of pre-configured services are available; self hosting has no data privacy issues, can be more vendor neutral, and may cost less.
Science Community Gateways could be good, too, but if you need to write a proper proposal (not just a formality like filling out a form) every 12 months then I don’t see the point, as you could spend that time with writing larger grants that can fund cloud computing resources or buying your own hardware.