From my limited experience you have to learn how to do the most with the least you have. Say enclosed trailer nice to have but don't need an open trailer does the job and sleep in a tent. Like Madcat said pack lunches, and drink water (which you should be doing anyways unless its for a photo op). Don't buy anything new except tires and gear. Pick up extra shifts at work. I do HVAC, so any side work went to trackdays/racing. Pack a luck for work and don't eat, $6 a day at mcdonlads adds up.