"...Once you sell off your premises things rapidly become complicated...."
Quite right! One thing that sometimes catches people off guard is LABELING laws regarding eggs.
Usually, to sell to a retailer, the eggs will need to be in (new) cartons, with your name &/or address, the size of the eggs, nutritional info, etc. I would think that would be the retailer's responsibility - though I'm not sure.
EggCartons.com has cartons with all the usual info.
A cheap way to add your name/address if you're not going through too many cartons is to use those free address labels that you get from Arbor Day, Amnesty International etc.
The advice about liability is good too. When a doctor finds a case of food sickness, it gets reported to the department of health, and a list of all the foods they can remember eating recently is compiled. Good practices and record keeping can help eliminate you from consideration early (or shield you if it did somehow come from your farm).
If you get very big at all, a talk with an insurance agent is in order. A few bucks a month against the unlikely possibility losing the farm is usually a good deal. But each situation is different, so only you can truely weigh the risk vs cost and make that decision.
-Frank
ps: Thanks for the kudos, CT!