Want to know what it costs to run a mobile slaughter unit (MSU)? That will vary from place to place, but these resources will help you figure out what your operating costs might be if you decide to go mobile.
NMPAN's Small Meat Processor Business Planning Guide (published in 2011) has a section with real financial information from a real mobile slaughter unit operating under USDA inspection in California. In that document you'll find a summary of MSU start-up costs, cash flow projections, profit/loss statements, and financial assumptions/explanations. We recommend you read the whole guide, but the MSU section starts on p. 27.
This cost calculator, described in NMPAN's December 2008 webinar, "Mobile Processing Units: What's the State of the Art?", is based on data from a USDA-inspected unit operating in southeastern Washington.
A feasibility study done by University of Nevada/Reno details construction and operational costs for two mobile units and a stationary fabrication facility. None of it was built, but the cost and revenue projections provide a useful template.