The expiration of federal, state, and utility incentives, mainly ARRA Section 1603, really screwed up the solar market in most of the US. Uncle Sam used to give developers of renewable projects (solar, wind, geothermal, biomass, hydro, etc) 30% of the total cost of the project in cash within a month or two of completion. Congress refused to renew that program after Solyndra, even though it was probably responsible for building several nuclear generators worth of renewable capacity. Companies can still get tax credits, but these newly-formed single-asset corporations that typically own the farms don't have any tax liability to offset. They can monetize the tax equity by doing some screwed up partnership flip structure, but that is time intensive and costly.
States also used to have incentives which ranged from state tax credits to RECs. These tax credits are even harder to monetize since now you need to find an equity partner who has a multimillion dollar state tax liability in, say, North Carolina. The market for RECs collapsed right after the utilities came close to meeting their renewable portfolio standards.
Most of the current pipeline of utility scale projects in the continental US involves a cramdown of the initial investors and developers. Everyone is looking for "broken" projects where someone else already spent the time and capital to get the project shovel ready. At the smaller end, there are even some contractors who financed the construction loans themselves and are being crammed down by the takeout guys. At the same time, many lenders have discontinued new lending and monetizing tax equity is expensive and difficult.
There are some exceptions such as Hawaii where 90% of their electricity is generated from oil so electricity prices are sky-high (think 5x+ California), but the local utility can't keep up with the requests for permits so projects wait in an ungodly long queue.
Source: My uncle does this work and was on this project.
But siting, getting approval, finding a place where few folks will fight you, etc etc make it add up in terms of time and uncertainty and then when you do find a place you can move forward on there's a good chance it'll be remote enough to be extra costly to connect.
However, the large, open, sunny spaces in CA tend to be far from large population centers.
He's now working on the project to replace/upgrade the original transmission lines from Hoover Dam which will pick up this power as well.
I'm in agreement with the other commenters saying energy production should be distributed. However, this'll require a "smart grid" to balance things out - which we don't have - as well as potentially being less efficient.
In many other cases, you see multi-year court battles (some in regulatory proceedings rather than traditional legal courts). A lot of the time those pushing the fight are not environmentalists but rather NIMBYs who use the laws/regulations to try to prevent progress. Same with High Speed Rail, of course.
The delay and uncertainty adds a higher-than-expected cost since the investment appeal erodes.
It's interesting that California's pro-environmental laws can sometimes be a hurdle to "green" projects in this sense. Different sides of the environmental issue spectrum.