<p>BTW, I'm not a lawyer either, but I work with contracts all day long (non-photographic). That escape clause may look good but I'd be reluctant to exercise it unless the situation was really, really egregious. It isn't very definitively stated and appears to be "anything I don't like can be used by me to back out" language. The non-payment aspect is quite clear, but the change of location, etc probably won't hold water unless there is no way the new date/location can be serviced. To include inconvenience or client selfishness/annoyance to the list of conditions would probably get laughed right out of court.</p>