Start an LLC prior to first investment?

[Jeff G.]

I am about 6 months away from being comfortable with perusing my first deal (for financial reasons alone.) I thought now would be a good time to put the business plan In my head into writing, start a LLC, make my formal letter head and build a relationship with a realtor in my target market. My brother-in-law is an attorney so I have free legal advice and council to form my LLC and to get my leases ironed out. My plan is to buy a duplex this year to get my feet wet and then next year things start blowing up with multiple additional buy and holds, with a fix and flip thrown in the mix. To all you seasoned investors. Does it make sense to you to form a LLC and does the above make sense to you? Anything obvious that I should be doing aside from more research in my target market? Thanks.