The FAQ says that after removing the original front forks and wheel, the net gain in weight is only about 60 lbs. The price is perfectly in line with a conventional trike, Hannigan TriWing, etc. As for that Toyota, no thanks. This one still looks like a motorcycle. The Toyota looks like a three wheeled car.
Don't get me wrong, the Toyota could be an option if you are just wanting a commuter vehicle but NOT to replace a motorcycle in my opinion.