Probably good enough advice, but the salary and tax part isn't really the key issue. It's fine to be a single member LLC and do the estimated quarterly taxes thing. As long as all of your deductions are reasonable your taxable income should be just about what you actually have. If you have multiple years of this kind of income the bank becomes agreeable to it.

It also helps to have a high income if you're going to do this, but then again that's why you do the LLC thing in the first place.