Sorry to say, but I doubt that a random child on the internet is going to convince companies (particularly western companies) to invest in such a risky venture. Vocaloid is a lot of costs without the guarantee of return: $10,000 to invest in the dev kit alone, paying an agreed amount to the voice provider, paying for studio time as well as equipment, paying the team who works with the dev kit, testing, and recording list, paying for marketing... Considering that the average vocaloid that isn't by Crypton, AHS, or BPlats doesn't sell well - and the sale tides are even more rocky for an English voice (or any non-Japanese voice period), you're not looking at a very desirable investment down the road from a business perspective.
There's also the hurdle of a still prevalent anti-technology mindset for those who would be more likely to seriously use vocaloid at a professional level: people in the industry (who tend to be older than your average gen-Y and gen-Z). The west still values heavily a live performance done with real people, which includes the front man/singer. There's also the additional hurdle of anti-animation. Anything that's drawn in general (regardless of art style) is seen as childish (or for kids) and is frowned upon. The fact that any large example of vocaloid work involves Japanese styled animation is even more of a deterrent - no company will want to seriously invest in what's seen as a very very niche geek culture (people who care about animation, art in general, and Japanese animation in particular).
Speaking of the culture that actually buys/cares about vocaloid currently, there's still the need to appeal to the fickle consumer: most people say they want more adult, realistic, high quality voices... We say that, but who do we still invest our money and ears to? Teenage soprano vocals and the occasional young adult tenor or baritone male - which again, most western audiences aren't fond of the former. We generally listen to voices and artists that are older than us and have an air of maturity that the main big sellers (Crypton, Bplats, AHS) simply don't have. What vocaloid audiences say they want and what they actually purchase needs to be in alignment if companies are to seriously invest in vocaloid.