URGENT. PROPERTY INHERITANCE

[Collette Douglas]

My grandparents are selling their 70 acre ranch in Vacaville CA. It is uninsurable as the state requires a new bridge and public access road to be constructed to their property. My thought is to make it a vineyard, bed and breakfast, winery with tasting room, possible on site restaurant, etc. Access to existing public roads would require purchase of easements from surrounding property owners as the state will Not allow them to rebuild the existing bridge in its current location. Where would I begin? Who would I consult first to determine the scope of this project? Then how would I determine whether the whole object is worth pursuing or If it's better simply sell the whole thing as is?