Hill Haven Ranch is a 60-acre property in the Browns Valley foothills of California, with land dedicated to grapevine production, livestock, and homestead facilities. The ranch works with Knights Grapevine Nursery to grow grapevine nursery stock, focusing on producing clean, healthy vines. Its facilities include a large arena, tack rooms, two barns, hiking trails, a pond, seasonal streams, and open space. Visits are by appointment only; the ranch is not open to the general public, and visitors must follow ranch rules and sign a liability release.

Hill Haven Ranch also offers practical engineering services, developing turnkey systems and solutions for needs such as drone mapping, custom circuit boards, CAD, additive manufacturing, automation, security, access control, monitoring, wireless systems, welding, and earthwork. The business draws on electronic warfare expertise alongside agricultural and foothill experience, and notes that it is not a licensed contractor. The ranch raises and cares for livestock, while Stephanie offers horseback riding lessons in Yuba City.