Ask HN: Legal costs for a enterprise software web startup

I'm putting together a proposed budget for an enterprise software web startup I'm working on. I'm pretty clear on all the development and marketing costs, but I'm not so clear on legal costs and insurance costs. On legal, do any of you have a rough estimate of what it will cost to cover employee agreements and to build an enterprise software license? I know the enterprise space loves to have one-off licensing for large customers; how much can I expect it to cost to close a single sale (remember, just the legal aspect :)? As an enterprise software provider, is there any kind of insurance I should have that I may be unaware of? I'm sure our legal counsel will cover that when we get there, but I don't want the budget to be too surprised. :) Thanks.