Is a daylight vault cheap square footage? Somebody told me this, is this true? We are searching for a alien home plan and somebody told me...

We are searching for a alien home plan and somebody told me this. should we put in a basment or of late stay with a single plane? we have a gradual sloping lot.
How to maximize nouns conditioning use??
Answers:    No such piece as "TOO MUCH SQ.FOOTAGE" I would STRONGLY suggest sealing and count a good vapor chain though........................