I think it's a very good idea (if the execution is correct).

Investment: around $22.500.000 ($900/acre) Capacity: around 22.7 mW (1 mW needs 1 acre) Sustainability costs: minimal Production: 6.81 mW/day (this is an average production. The math is: capacity*0.3...will exist better and most "poor" days, but this is in general the average production/day) Lifetime: 25-30 years with this daily average production (based on studies, the average production will decrease with 20-25% afeter 25 years).

Now...everyone can do the math, if it worth :)