[imtringued]

The opportunity cost for what? Half the reason why this particular project exists is that Biden has realized that the best way to bring money into the hands of people is by giving them a job that is useful to society.

As it is right now there is enough funding for every conceivable project, assuming the project is profitable (pays debts back) the only real limits are physical resources and unemployed workers and running out of unemployed workers is a policy goal. If we hit real limits, then interest rates will go up and lenders will demand greater returns, which may mean that a solar project like this may not get started and people start seeking out more productive ideas. However, the most important thing is that investments pay their debts back.

[bongobingo]

The opportunity cost for the cash you had to put down to install a solar array. Or the opportunity cost of the interest payments you’re making on a loan.