Yeah...Sonoma is known for great wines :(
I don’t know much about vineyards, but I imagine it takes a while to get vines established to produce grapes for wine :(
Three years from planting to first harvestable crop. You have to prune back any fruit that grow within the first 3 years, so that the root systems have a chance to fully develop.
Don’t know about CA, but in Nebraska (yes, we actually produce wine here) the start-up cost for a vineyard is between $10-20,000 per acre, depending on the grape varietal, the trellis system, and type of irrigation you choose.