4,000 hours is two years of a normal full time, 40 hour a week, job. I don't think that it really takes two full person-years to convert a bus, does it? Using $50K a year for semi-skilled labour and a normal 2X markup for fully loaded cost of employment, that's $200K in cost for labour alone. That just strikes me as a lot, but maybe it's the way it is. That's about double what it costs to build a 2000 square foot house around here, I have some friends who do that, it's three guys for three months and done.Brian