Welcome to the site. I’ll reiterate what a lot of folks have already hinted at… this is not an ideal use case for woodgas.
It’s kind of like the old saying, “pick any two”: highway speeds, heavy loads, long distance.
Wayne’s V10 Ram can haul heavy loads at highway speed, but only for very short distances.
Mostly he chooses to run heavy loads at low speeds, or unloaded at medium speeds.
The standard woodgas Daktotas run highway speeds, and can go long distances - with very light loads.
Trying to do all three is simply impractical. I don’t mean to be a wet blanket, but I won’t mislead you.
All that aside, you should definitely start with a regular gasifier build. Walk before you run. Once you build a woodgas truck and put 10K miles down, you’ll have a much better idea what this project entails.