The mirrors will not exceed engineered high wind loads nor gravity snow loads. TV dishes are polar mounted. Annual performance can be predicted from solar data tables for various locations. The following link is a good source for calculating the solar resource for a mix of fixed and tracking solar collectors. Return on investment depends on the value of the energy displaced.
Industrial consumers pay about half as much as residential consumers.
A very large solar thermal market could emerge by exploiting a market niche in electrical power displacement. This market potential needs leadership. The current efforts to make electricity with solar power have confused solar consumers. Developers should capitalize on the strengths of solar energy - that it is available globally and it is transported locally to the consumer for free. Solar energy does not need to be converted into electricity and fuel nor transported by wires and pipes to be cost effective.