A remarkable 1,100-acre estate on Sonoma Mountain has been sold for an astounding $38.5 million. Entrepreneurs Mark and Debra Leslie have converted this once undeveloped land into a self-sustaining retreat, pouring in $33 million for environmental restoration and diverse farming infrastructures. The property boasts a contemporary main residence with breathtaking views, showcasing the growing interest in secluded, off-grid homes in coastal California.