Do I start a company to wholesale?

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Hello all! I am not sure if this has already been covered, if so I have not been able to find it. My question is should I start an llc before I start finding deals and signing contracts? My friends and family have all told me I should to protect myself but I have not heard that from anyone that actually does wholesaling. Also, are there any documents that I need to prepare other than the 2 contracts between myself, the seller and investor? I am afraid that I have now done too much reading and have confused myself on the basics of starting out. Thanks in advance for the much needed assistance!