Apple Ber Cultivation

Hi All,
My self PhaniKrishna, we are planning to go with apple ber in 4 acres.
Could you please provide me the details about the below mentioned points:

  1. best time to plant
  2. where can i get the best saplings
  3. how much time it will took for the first yield ( i heard that in the first year itself we will get the yield)
  4. what would be the yield in the first year ( i heard that 10kgs per plant in the first year, 10kg/plant is huge. anyone pls confirm)
  5. what would be the initial investment
  6. is the market good for apple ber in andhra pradesh?

Note: My farmland is in andhra pradesh near vijayawada

Thanks in advance
Ponnam PhaniKrishna