Running cable through an existing structure is an incredible PITA, unless
you get extraordinarily lucky. Do you have insulation in your exterior
walls? Any firestops? Good luck then.
An experienced electrician has a lot of tricks learned from years of
frustration that will sometimes let him get around obstacles. I doubt a
novice has a chance at your project. (Last year it took me 6 hours to run a
switch leg up a wall to the attic and down an adjoining wall.)

Go wireless or not at all.