Are you wanting to teach elementary school? If not, what how are you planning on using an ESL degree? Have you considered a double major so that you could teach elementary school and use your ESL or do something with ESL such as interpretation in an area with young children. As a teacher, I think the Elem Ed with ESL is a better route, but the double major is best.
Many teachers find that they are more marketable if they can teach more than one thing or have a specialty, such as ESL or another foreign language.
Good luck!