Run three zoom meetings at the same time - 9 hours

Is it possible to run three zoom meetings at the same time ?

I need to arrange zoom meetings for a computer conference.
It will mainly be in person, but will also have a zoom meeting for remote viewing and expect 20 to 50 zoom attendees.

There will be three rooms with one hour presentations in each for 8-9 hours.

Is this possible to do with Zoom ?
What type of Zoom account do I need to have ?
Are there any issues or tips that you can tell me about ?
Can I use three meetings to do this or do I have to use three webinars ?

Thank You