I wrote this last weekend while listening to the show, and the discussion here has highlighted a few points that are added after the carat-marked text (sent to Doug Berman):
The “magic bus” VW idea STINKS. It will always break down under load, block the narrow roads in the area, and not be either fuel-efficient or eco-friendly, even with alternative fuel conversions. Besides, it may not pass muster with business and environmental regulatory agencies.
But building a 'green" stretch convertible is not so very hard.
First, a Mercedes 500 or 600 limosine with Diesel is necessary. Some are indeed made with convertible tops. Some are big enough for 12, but most won’t hold more than 6, so a stretch treatment would still be necessary. The best companies for this are in (gasp!) Southern California, but a few coach conversion companies also operate in the Bay Area.
Next, convert the vehicle for bio-diesel - using either recycled cooking oils or other materials, with a propane tank backup arrangement. This is a readily-available
commercial conversion. These conversions meet California Air Resources Board (CARB) and ABAG standards.
These vehicles are made for that heavy duty, are nicely appointed, and will run until he retires. They also have an old-fashioned kind of look but are modern engineering.
I may have been wrong about being able to run a diesel using a propane conversion. There are some alternative fuels besides recycled cooking oil, however, that will work in a diesel engine and there are already commercial conversion kits. CARB has all the data on it so it’s easily obtained.
In addition, if the guy gets in touch with the Cal-Start Consortium at Burbank Airport, he can obtain some nifty electric-powered add-ons that will use passive energy recycling from all his braking operations. This provides a form of supplemental “hybrid” propulsion he can use in many ways on this vehicle, including powering various accessories.
Safety, reliability and above all compliance with environmental regulations matter not only just to the business operator and regulatory aencies - but also, the folk who like to visit Santa Cruz might seem hippie-dippy, but they are usually also educated, intelligent, comfortably financed, and demanding customers. Getting too cute is a fast way to fail if the vehicle isn’t really right.