The first few truffles in a one acre or larger orchard usually appear in between the fifth and seventh year after planting. On rare occasions orchards have come into production after four years, but in general it is not until the eighth to tenth year that full production levels are reached - about 50 to 75 pounds per year. This can be sustained for as long as 30 years with proper interplanting and maintenance.
Prices have climbed steadily for the last 10 years due to rising demand and limited production. The low has been $350 per pound, with current season commanding over $2000 per pound in some markets. Certainly $500 per pound is completely realistic, and at a minimum of 50 lbs per acre, this amounts to $25,000 (gross) per year/per acre. We are currently selling truffles for $800 per pound.