One additional thing to consider: Very short stays at a company are a red flag on your resume. Sure, you can probably do it once, at the start of your career, for double the money. But don't do it regularly, or it will hurt your employability.
"I'd feel like a giant douchebag": Others have said that you don't need to feel that way about it. They're right. But if you're still going to feel that way, then don't do it. You've got to live with yourself, and the money isn't worth it at that price.
"I'd feel like a giant douchebag": Others have said that you don't need to feel that way about it. They're right. But if you're still going to feel that way, then don't do it. You've got to live with yourself, and the money isn't worth it at that price.