Where my horses spent the winter the owner asked for 4 weeks in advance, extras after that so at least he wasn't hugely out of pocket. His field management was crap (not really horse minded) but he was kind enough to let me have use of a large cattle passageway behind the barns when dhorse was confined with mud fever.
How do you get your liveries? Can you vet them a bit more strictly, get them through word of mouth which hopefully means you know a bit more about them?
I dont see how anyone can make a profit from DIY liveries, when you add up the water, field trashing, fence trashing etc, must be marginal really. this winter was esp evil though so things can only get better!