I don't get out of bed for less than $100k unless it's $10k for a local gig for a week. They're going to pester you endlessly for free labor post-sales if you

I don't get out of bed for less than $100k unless it's $10k for a local gig for a week. They're going to pester you endlessly for free labor post-sales if you let them, but consider offering a support contract on a per-incident / per-hour basis which could Lingchi-them, consulting-style.