Homes w/ Angles

My architect initially drew up plans to have it framed with curved walls. After showing it to my builder, he said straight walls, and rectangular/squared homes will always be cheaper to build- to stay away from curve.

Went back to architect to draw up 2 sides to meet at an angle and I like it much better than the curve.

What are your thoughts about this plan and will contractors hate dealing with this type of build? I’d imagine the framing and roofing would be difficult! And foundation?