I hate to be the naysayer here, but I speak from some experience.
I and a friend decided to do a similar project 20 years ago. Luckily, we didn’t spend too much money before we abandoned the project.
Assuming you want to put this on the road, here are a few problems you should have resolved BEFORE you spend another dime...
Slim few insurance agencies will even consider insuring a vehicle you built yourself. Some will insure kit cars, but only those commercially sold kits. If you can’t get insurance, you can’t get it registered, and game over. But, assuming you actually did get it insured for highway travel, next is.....
You’re gonna love this process. A VERY few localities have Dept of Motor Vehicles that will allow you to register a home built vehicle. Most will not. I spent two years trying to get a formerly commercial bus, which I converted, registered as a motorhome. There was no clear process in the DMV bible for allowing it, and none of the DMV dingbats would risk doing anything that wasn’t written in stone in their bible. Several clerks had me doing a variety of tasks, but every time I completed them, some other supervisor would say that wasn’t sufficient. I wrote letters, talked with the head of the DMV, etc. I was only trying to change the purpose of a factory-built vehicle, not register one built by myself.
They may require proof that your vehicle complies with the Federal Motor Vehicle Safety Standards. Good luck with that.
If you go forth, I’d suggest you get a thrashed motorhome, redo the mechanicals, get it registered, insured and on the road for a year or so, then substitute the airframe for the factory motorhome body. And not tell the DMV or your insurer a darn thing. This is assuming your insurer does not have a clause about modified or reconstructed vehicles.
4. The modification.
I see several potential problems.
The nose wheel. Your drawing shows a very top heavy design, coupled with a tricycle gear. Even turning corners at low speeds, your risk of a roll over is very high. You’ll need brakes on that nosewheel too. How many aircraft have nosewheel brakes? I’d consider a stock four wheel design.
Visibility. Driving with the stock windscreen set up really reduces your ability to see ground objects, and your likelihood of hitting other vehicles and fixed objects is high.
Width. Make sure your max width is less than 8.5 feet, other wise you’ll need oversize vehicle permits to put it on the road. Perhaps consider removing the wing stubs completely. Some states have added more restrictions on RV dimensions and weights, requiring additional driver certifications.
Also consider that most motorhome chassis are barely able to handle the weight of the vehicle with two people and full fluids. Look at wrecked motorhomes in junkyards to see how cheaply they are built, just to shave weight. How much is your airframe going to weigh after you’ve added all the required items and a few amenities? I’m guessing at least twice as much as a similar size motorhome shell.
How is this vehicle going to handle on the interstate with high crosswinds? Or when an 18-wheeler blows by you? You could spend years of work and tens of thousands of dollars, only to get out on the road and find your dream vehicle handles so poorly you don’t want drive it.
If you have excess time and money, great. Most of us do not. Consider all the other noble deeds you could accomplish with that same time and money. You've only got a limited number of useful days on this planet, spend them wisely. I've met a fair number of homebuilt aircraft builders, who invested tens of thousands and years of work, but eventually gave up and had nothing but a huge failure for their efforts. I've worked with the Wounded Warrior Program, and can say it is by far, the most rewarding work I've ever done.
5. The cops and TSA.
If you put dummy guns on this, you’re probably gonna get pulled over by every cop that sees you. And they will likely initiate a felony stop, with guns drawn, and all their buddies responding to a radio report of a heavily armed assault vehicle.
I’ve spent three years in law enforcement, and have watched the overall professionalism of the field drop year after year. With the advent of cellphone cameras, we are just beginning to see exactly how big the problem of untrained/rogue cops really is. Do you feel comfortable with a rookie cop pointing a loaded gun at your head, and both of you knowing his fellow officers will help cover up an illegal search/seizure/shooting?
If your vehicle meets a TSA vehicle checkpoint on our nation’s highways, expect to be treated like a terrorist, and at best, just be detained for a couple hours while they ransack your vehicle. I’ve dealt with vehicle searches by the Thugs Standing Around when driving through SIDAs. They were basically goon squads, with incredible powers, little training, and no adult supervision. Their conduct was ten levels below the TSA agents you meet inside an airport terminal. Oh, and once they’re done trashing your vehicle, they leave you to clean up the mess and repair the damage.
Sorry to rain on your dream, but pushing for this to become a reality may well turn into a nightmare.
I'm a natural born Texan. I don't believe in the words "It can't be done."
I've already nixed the idea of using a tricycle gear. It would be under 8.5ft and I'm an experienced auto builder. It weighs under 3,000lbs right now. I plan to have NO normal heavy motor home stuff inside-shower,toilet, gray water tank etc. It would be a large hollow panel truck. I rarely leave the state, so I'm not terribly worried about the police or DPS troopers doing searches. A friend of mine drives a Jeep daily with a replica M2 Browning on a mount. I don't think he has ever had trouble because any rational cop can see that he isn't a terrorist. I suspect most police would be wise enough to realize that this thing isn't really a fully operational bomber going down the road. And if I get one that does think it is, then I will have one more story to tell about having guns pointed at me. But, I do value your points.
The nose art/aviation artist from Houston, Texas http://www.jasonbarnett.net