To generate 1MW(lay man sense,1000 EB units per hour) power you would require 4 acres land. This can cost you about 8 crores.  You can get incentives from Ministry of New and Renewable Energy. It can pay itself in about 7 yrs and remaining 15yrs it would be free or for profit.

• 1000 Units per hour,8 hrs of production = 8000 units
• Govt can procure for about Rs 6 per unit. Fixed price for 25 years. Need a 33kv substation near by
• 300 sunny days in a year
• Approximately generates income of Rs 1.2 crores/year.
• It works out to be IRR(Internal Rate of Return) 15% a year post tax

Further reading

• http://www.teda.in/pdf/tamilnadu_solar_energy_policy_2012.pdf
• http://cii.in/WebCMS/Upload/Draft%20Guidelines%20for%20Solar%20GBI_11%20kV%20Scheme-IREDA.pdf
• http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=1451&title%20=%20How+to+Set+up+a+Solar+Farm%3F&b_type=new&id=12335
• http://www.pib.nic.in/newsite/erelease.aspx?relid=78829