This is actually the second 4dr built in Thomas' shop and yes, his intentions are to build them commercially. When I talked to him the other day, he was in negotiations with a customer for the next 4dr build.
Although no part of this was easy, the ideas learned from the first one helps shorten the learning curve involved. My door posts were done a little different from Rick's, and I figured out a better way to shorten the rear doors. Modifying the rear seat was a little challenge, and stretching the half cab top to fit (and then building a mold so more could be made later), took over a year. The hardest part is actually engineering and designing the features. Once the decision is made of how to do it, the actual work is straightforward. Other than the pieces which made it into a 4dr, the rest is just like doing a restoration on any Bronco. Except for having to fit a couple extra doors, which was a real pain.
Would I do it again? No way. I'll probably never even paint my '76 Bronco. But the experience was something that I will treasure for the rest of my life. But Thomas will build you one even better than mine. Rick's will have a custom tube frame with 3 & 4 link air ride suspension, 4bt Cummins, and ZF 5spd transmission.