You idea is quite interesting -- sort of "Show don't tell!" --, but I'd say it won't work. I'm sorry.Hardware is cheap, today. Custom software is not!
Nobody's going to rewrite existing software to save a few thousand dollars on hardware. Thus, the only potential clients are those who start a new project. Unfortunately, they are also unlikely to be interested. This is due to the special economics of software, in general: The switching costs are high and there are large network effects. The same basically applies to frameworks, too.
Someone considering a new language/framework for a new web site wants answers for some very basic questions:
Is there sufficient demand for the language/framework? This is because a language/framework used by many others is less likely to vanish into obscurity.
Is there sufficient supply of programmers fluent in the language/framework? Without experienced programmers, the existing ones are a scarce resource (and thus expensive). One would need to train others in the language/framework or may be required to rewrite from scratch, someday.
Is there sufficient supply of Add-Ons under an appropriate Open Source license (BSD, MIT, Apache)? Without such add-ons (Forum, Wiki, Issue Tracker, eCommerce, Blogs, etc.), everything needs to be written from scratch.
To sell a language/framework, in general, you have to prove that these problems are already solved. On top of that, you have to show that is also provides additional benefits -- higher productivity, for example, or less maintenance. Typically, one does so by providing references to case studies, testimonials, words-of-mouth, a large ecosystem, etc.
So, to answer your headline question: To show businesses that a new technology helps them solve problems, you point to other businesses who already solved their problems with the new technology.
How do you find the first one?
Simply, in theory: You'd need to establish a beachhead by writing a killer application. Then, you may be able to sell training or support on top.
Hope that helps.