What are the rules for obtaining temporary teaching licenses in Thailand when switching schools?

Hi everyone had a few questions about temporary teaching licenses. Basically I work for a school and I got my first license with them but I want to switch schools and work somewhere else. In doing so I believe I would lose my first teaching license and I would have to get a new one with the new school correct? Is there a limited number of temporary licenses that you can get? If so how many is the max? Is it I’ll advised to switch schools because of this reason? Also what would be the easiest (cheapest) option for obtaining a permanent license? Thanks in advance.