If you’re using the latest version of ACF Pro then you don’t need to worry about my comment about term meta vs options.
It is possible after ACF 5.5.0 to get custom fields on terms differently. You can use the $post_id listed on this page https://www.advancedcustomfields.com/resources/get_field/ under the Get a value from a different object section. The new value for $post_id is detailed in this blog update from the developer https://www.advancedcustomfields.com/blog/acf-pro-5-5-0-update/. You can currently use either method for determining the $post_id method to use when getting values.
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