There are a few steps to create the custom quick edit box and custom column
create a custom meta key (assumed that you have 1 already)
add custom admin column title and data (assumed that you want to shows the custom meta key in the column, if not, you may also modify a bit of the logic to accomplish the same effect because the principal is the same)
add custom quick edit box
add save logic
load script to modify original inline-edit-post function in order to support custom meta value