Oi! #jitsi wizards!

I am trying to convince a large community, running regular online meditation/webinars (non-religious, though) via Zoom, to change into some other platform. They say:

Since we often have more than 300 people (and for some events, up to 1000) simulcasting from all over the globe, stability and accessibility has become our biggest concern, because without it our ability to consistently relax into ritual space with people of varying levels of access is severed instantly.

Would it be possible to fulfill such needs with a self-hosted Jitsi instance? Or perhaps some other Platform? What kind of hosting would be needed for that?