I've noticed that you really like this idea. That's good - you'll need passion. But, I'm concerned that you have so much passion that you've convinced yourself that if you build a high end product, you'll get customers.
There are a lot of very smart people out there and $10m isn't too much for an experienced founder to raise. If this market is so big and frothy that you can name hundreds of low end competitors, someone would be competing at the high end. Why isn't anyone??
Once you can answer that, you'll know what kinds of avenues are available to finance it.
Sometimes, high end variants look seductive because there's no competition. But, there's no competition because margins are too low to support the high end product. Other times, there is no competition because sales cycles are measured in years and nobody can stay alive long enough to get to yes. Other times, there is no competition because you have genuine insight that gives you a severe competitive advantage.
Those 'choices' point towards three financing options. The first one, if margins aren't high enough to pay for the damned thing, you're starting a non profit, so it's time to look for grants, patreon, etc. The second one, where sales cycles are too long, is a great use case for crowdfunding. And the third one sounds like a deal that VCs would get in on (if you have the background/communications skills).
On the other hand, if you can't figure that out, or if you keep coming back to no financing, you might be looking at a bad idea...