Is it possible or is their planes to add a set home for above foundation? So like in a multistory base you can set home like on the 3rd floor.

I always /sethome on the 2nd floor whenever i build a base, its all in the config instructions

AllowAboveFoundation - Allows to set homes on Nth floor of a building when above owned/shared foundation (floor/ceiling). If false, player must use home/sethome on a foundation (1st floor)