Retail stores will not buy from a guy storing his own oj. You would have to sell it back to a wholesale warehouse first and expect that it would eat up much of your expected profits if you were successful at all in selling it back. I guess the worst case is you have a lot of oj to drink. I just read about this exact situation in a book called 'More Money than God' (pretty good read so far!). The guy made a profit but had to give up about 20% in doing this sort of thing. Luckily he had enough profits to cover the haircut and still be profitable.
"More Money Than God: Hedge Funds and the Making of a New Elite" by Sebastian Mallaby. Here is the link on Amazon: http://www.amazon.com/More-Money-Than-God-Making/dp/1594202559
You have to pay for the freezer and electricity, land, building, etc. FCOJ is stored on a massive scale by Tropicana and others.