It appears to me it would be a good idea for anyone contemplating expediting to put a nickel a mile into the OOIDA spreadsheet for maintenance costs when doing their exploratory work, provided they're running a good condition American van.
Expenses should be estimated high and revenue estimated low.
Excellent advice! What I posted was my actual costs for maintaining the van as it came from the factory. As noted, this did not include add-ons like auxiliary batteries, stereo system and other creature comforts. A nickle/mile would allow for some variance and be a good base figure.