How many years for persimmon to fruit and what income can I expect?

Persimmon is a tree crop that usually starts bearing some fruit around year 3 to 5 after planting and builds up over the following years, then crops for a long time. Yields rise with tree age and depend on variety, climate, pollination and management, so per-tree and per-acre figures vary widely and no single number is reliable. Income depends on the price for fresh fruit, which can be good for quality fruit in season but the market is still limited and somewhat seasonal, and astringent types need proper ripening or treatment to sell well. Plan for several years before meaningful returns. Get realistic yield and current price ranges for your variety from your KVK and from growers already harvesting in the valley before you scale up.