The price is better than the hypermax kit, would this just be a turbo or would it be a full kit , new refurbished etc? That would help sway opinions too. I would go your route versus a new pulse kit, if they were comparable. Just makes financial sense.
As for vgt, a used vgt plus the basic electronic controller would be less than this price. It works except for exhaust braking from what i recall from the phone call.
Fuel makes power too, so I wonder if this kit would include methanol injection or something. 90cc is good for 200-230hp, as we've seen with the dyno sheets from trucks at rallys. Squeezing more efficiency wont net much more power without additional fueling.
For the respect people have for the Moose stuff, I'm sure you could get units moving if they existed and were proven. A drop in turbo, intercooler setup would sell well if priced reasonably. Make a kit with a moose pump combo even. Camshaft? (I know your shop is a fuel shop but could outsource it).
The best advertisement is word of mouth, I've seen many sore IDIs around town. Most people with these beat up trucks don't know where to turn to but I'm sure a few guys would jump on board if you told them you could safely wake their engines up. I know if my truck was N/A and there was a kit that could get it doing 250+/500+ for up to 1500$ I'd hop on it.
1500$ is a lot of money for someone to be a test subject, when proven albiet dying sources are around. Just like the moose ip vs super moose. No supers exist, the regular is proven - so why put my neck on the chopping block (if something went wrong)?