The main thing I’d be wary of is the fact that 9-12 months is not a long time in the startup world. Are you sure you’re going to have product-market fit and have a mature enough product to actually sell in that time? There’s a reason why vesting schedules are ~4 years.

What happens when he leaves and suddenly your metrics plateau because he was the only one selling the platform? Is he going to bring in and train a revenue organization in that time too?