I would order and buy well in advance of need. Daughter finished up her house late November of last year. Not fancy at all, but we spent about $180 Sft including appliances for the living area, not including a large garage and small deck. Probably close to the OP $150 to 160 living area cost. Was 16 weeks on windows, 2 weeks wait each time on just concrete and then delays getting metal roofing and electrician in. I've got two neighbors building, both have run into long, (2 to 3 months) waits on materials. And everything is way up... just way up. Good luck.