Last time I wrote about the challenges of finding the right truck to pull the weight I'll be carrying.  I was at my dentists' office, telling him about the Vehicle while he was getting his tools ready.  He said,  "Come with me," and led me out to the garage, told me to stand right behind his "clean diesel" car and turned on the engine.  I smelled NOTHING!!!!

So I went online and starting reading about clean diesel.  I am very reactive to diesel exhaust, so if I go this route, I need to make sure the engines in the heavier pickups  meet my standards, but it's an exciting possibility that would give me some more leeway with weight.  I still need to keep the whole thing under the limit that would require me to get a commercial license, but I wouldn't be weighing every ounce.

Here's what I found:
Effective Emissions Control Technology
Introduction of ultra-low sulfur diesel fuels for both on- and off-road applications has been a central part of the new clean diesel system designed to meet near zero emissions standards. With the introduction of lower sulfur diesel fuel, a number of exhaust treatment systems such as particulate filters, exhaust gas recirculation (EGR), selective catalyst reduction (SCR) and diesel oxidation catalysts (DOC) can further reduce emissions from diesel engines. The installation of various emission control technologies may also improve emissions from older diesel engines through retrofit capabilities. Read more about retrofit capabilities to reduce emissions from older vehicles and equipment.

I have not yet been able to find out exactly what the heavier trucks I'm looking at are fitted out with, but hope to know in the next few days.

It all started on day in May of 2010. I'd been away at a writers' workshop for a week, came home to my apartment and got violently sick.  I'd been sick most of the time I lived there, and in the past, when I'd traveled out of state and come home, and gotten sick, I'd assumed it was the travel that was wiping me out.  But this had been a local workshop.  Over the fourteen years I'd lived in that apartment, I had pulled up the carpets, laid down wood parquet tile and cork flooring in the kitchen, paid several thousand dollars to have mold remediation in my kitchen, convinced the owners to replace old linoleum with a tile floor, and repainted the walls with zero VOC paint, but three factors remainedout of my control: mold persisted inside the walls and made the air musty, and my neighbor sprayed roundUp on his lawn and vented a dryer at my front door that was so heavily scented with detergent, fabric softener and dryer sheets that you could smell it a full block away.

I realized that I couldn't stay in that place another day.  But a neighbor's guest house in the process of remodeling proved even more toxic.  After one night here, I began having bad neurological symptoms.  That started me on a summer of sleeping on porches, in performance spaces, un-carpeted offices, and couches. One afternoon, while venting to a co-counselor about the challenges I faced, and all the investment in my old apartment that I was abandoning,  I said "I wish I could live in a Romany wagon." That way if a neighbor started spraying poison, I could drive away and take my house with me. 

In the five years since then, I've done massive amounts of research.  I learned about designing small spaces from tiny house pioneers at Tumbleweed Tiny House Company, and pored over floor plans, and books full of small shelters of every kind.  But Tumbleweed's houses are build with standard materials: plywood and fir and pine boards, and they rely on propane for heat and cooking. Plywood outgasses formaldehyde, pine and fir have terpines, that nice piney smell of fresh cut wood that can cause respiratory irritation, and I don't tolerate propane. 

While I began researching alternatives for the basic structure, I was also wrestling with the many possibly ways to move a small home around.  The tiny house builders I consulted were designing homes that would move every so often, but I wanted to be able to travel, and it was clear to me that pulling a tiny house with a regular trailer hitch is not a safe way to live on the road.  I looked at the motor home option, but it's very hard to strip all the toxic materials out of a motor home, and having the living quarters and the driving mechanism all in one unit means that some leakage of engine fumes is almost inevitable.  The same went for bus conversions.  

My next idea was to build inside a box truck.  The motor would be more separated from the home than in a motor home or bus, and more stable than a trailer.  But as I started looking into sustaianable fuel options, that became less and less appealing.  If I built inside a box truck, I'd be stuck with that vehicle, and none of the current alternatives are practical for a big heavy truck. Electric vehicles don't yet have the horsepower or charging capacity to haul big loads long distances.  Vegetable oil is for the young and able bodied.  It takes a lot of work to make the oil into a fuel that won't gum up the engine, and I don't have the capacity.  Biodiesel is not really available. What's marketed as biodiesel is usually 20% vegetable oil and 80% fossil fuel.  And in much of the world, the idea of feeding corn to engines instead of people is akin to a war crime.

Vision Corp makes a hydrogen fuel cell big rig truck, (for $175,000) but although there's a tipping point in sight, no one has a functioning solar powered hydrogen generator yet.  In the future I may be able to use a fuel cell truck with an on board solar generator, but that's not now.

So I finally decided on a 5th wheel or gooseneck trailer.  It's more stable than a regular towing hitch, but has the advantage of being separate from the engine, has a bunk that sits over a pickup truck bed, adding a sleeping space to the original 24' floor plan, and the truck I use to pull it can be switched out when a more sustainable option comes on the market.

And rather than buying a flatbed trailer and building up a structure from scratch, I can buy a gooseneck trailer shell, made of 100% aluminum, with no structural wood at all.  Stay tuned to learn the thinking behind my other decisions, and some of the choices that are still pending.