I'll start, and Brent may want to add to this.
One of the key things is doing it incrementally. By that I mean there are examples of projects that have been built, and if you don't overbuild supply beyond what the load will take, you can make it work.
Another one is putting the infrastructure in place that will allow you to bring in renewable sources but also use natural gas. I'm not here to advocate for natural gas; it's just that at current prices, if you're putting in thermal systems, you can run them on natural gas but you can also have them set up so you are able to incorporate solar, geothermal, biomass, or other sources.
If you take it in small bites and demonstrate the technology and its application, you can get at some of the cost issues incrementally. That's one approach, at least.