1 acre has 4000 meters squared. You could put about 2000 m^2 of panels that would produce about 720 kilo watts peak and about 3500 kw-hrs of energy.
The system would cost about $5,800,000. You would sell about $350 per day of power or $130,000 per year before operating expenses, so net about $100,000 when they fail in 25 years, you will have brought in $2,500,000.
OH well Obama will bail you out when he has placed himself in a King of the USSA.