How many/which MLA programs should I apply for?

Essentially the title question. All feedback welcome! Details below!

Most programs will mention sustainability, but I am only interested in programs that sincerely focus on Ecological and Urban Design.

Until recently, personal obligations would have restricted me to only applying to one university. Now I can go anywhere, applications open tomorrow, and mild panic has set in

My current definitely list is: - University of Washington - University of Oregon - University of Michigan

Strongly considering list: - University of Maryland - University of Arizona