This is beautiful. From the look of the kitchen island and the bar stools, the kitchen is likely to be nicely done as well. I like the loft for a guest room. I would also consider sliding barn doors as a separation for the bedroom.
How to Transform Your Attic Into a Dream Storage Space
if the ceiling has to be lower in spots, The heated square footage doesnt count if under a certain height. See about utilizing those space for storage, bookcases etc.to make the space attractive and purposeful