The only issue you may have is if you have active subscriptions on it. I believe you can de-register it once there are not subscriptions, then register it on a new account while leaving everything in tact. If you have it linked to any cloud services be sure to unlink them on the cloud side and remove the apps from Hubitat.
@bobbyD does that sound correct?
Here is a search which gives some useful results: Search results for 'transfer hub to new owner' - Hubitat
Another option may be to just transfer the admin account to a new email that you create for the "house" and then give the new owner all the credentials: Replace Admin from my.hubitat.com
