What business entity would you use?

[Harold Smith]

My wife and I are self employed and run our current business as an S-Corp to save on self employment tax. We are wondering, since we will be starting out small, should we buy real estate under our current business? If not would you start out buying as a sole proprietor until your investing reached a certain level, form an LLC and elect to be taxed as an S-Corp, or just go ahead and start another S-Corp?