If you are an administrator in the new temporary organization, you can create a new ssid, etc. The question is, are the equipment you are going to add in the current organization's inventory?
If so, you will not be able to remove it to add it to the new one as you are not an administrator.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
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