First off I want to say I did not invent this method I am just showing you how to do it. Just follow what this says and you will have the most functional and compact elevator known to minecraft.
Step 1: TUTORIAL!
Please just go into photo view mode and follow the steps.
Step 2: You Are Done!
Thank you for looking at this. Use this for a floating house or a hotel on a server or whatever you can think of, the sky is the limit, literally.