I have no knowledge of this company but I find it highly suspicious that they are selling a 500 gallon reverse flow on a trailer for $2500. I am in the process of securing materials to build that exact setup. I picked up the 500 gallon tank for $100, and I got lucky that my metal supplier ran a 30% off, 4 hour sale yesterday. I was able to pickup all my metal material and save $500 bucks on that portion. Having said all that I am already above $2500, and that doesn't include consumables, paint and most importantly time.
There is a reason that Lang sells the 108 for $7500 bucks. I tend to think if it seems to good to be true it probably is, but it wouldn't stop me from checking them out pretty closely. I am sure being in the metal working business they can get materials below my cost, even when taking that into account, I just don't see how they can afford to build that cooker without losing money.