Let's say I'm trading out of my garage, and in addition to, say, being a college professor (can't beat the hours), I'm pulling in 40k-50k a year almost exclusively in options premium, varieity of types, equity, index, futures. If I incorporate, can I park my profits, short-term, in an IRA? If so, what kind of IRA and how muchg can I put in there? I assume I can write off all sorts of garage-related trading expenses, too, no? Any reason not to do this? Does it matter what state? What kind of corporation. I live in Florida.