"Ve'kidashto" in accepting applicants to the kollel

In my position as head of a kollel, two avreichim came to me to be accepted into the kollel. I only have room for one. I have no preference as to which of them is accepted. Is it preferable to accept the first one who approached, or should I prefer the Kohen (who approached me after the first one asked) because of the rule of "Ve'kidashto" ("and you shall sanctify him")?

Shalom u-vracha 

The first one who approached has the right of precedence. 

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