You want an idea about what you can say. I know it sounds like a bad idea but here's specifically why its actually a great one. You want to sound crazy but you want to ask to be right.
If you compromise and hire someone mediocre you will always regret it.
Unpopular but right is what you're going for.
You need unstoppable people. You want people that are just going to get it done.
Startups are very hard no matter what you do; you may as well go after a big opportunity.
I think as a rough estimate, you should aim to give about 10% of the company to the first 10 employees.