I really hope that this takes off. I think that it is an awesome idea, and one I would jump on if I wasn't so far back/away from swap on my project. I do think you are going to be experiencing the same problem as every other company who does parts or service for Mopars though. That is quite simply lack of demand, largely impart to low production numbers of these vehicles, even less that are still around, and even less that are doing a modern hemi swap. Chevy's have the production numbers so there are tons out there and parts manufacturing is cheap. I never want to hear a guy restoring Chevy's tell me that his parts are expensive, they have no clue. That being said Mopars are the coolest muscle cars and the only one I would spend the time restoring.
I also do think that probably despite your status on the forum here a lot of people are a "leery" of throwing money to a guy advertising a service that will happen at a later date. I haven't been here very long, so you may know a lot of people here in real life, I don't know. I just know as a general rule from my experiences on other forums, these type of things sometimes never materialize or the poster vanishes and so does the money.
I think that if you were to have a teaser, or something that shows this deal is actually happening, it would help a lot of people jump on.
It may be a good idea to get a website going, have some free info on there, username/password protect the directory/pages containing the good info. Such that full access is restricted to full "participants" who have paid money in.
Good luck and I hope that this really pans out. I'll be excited to throw some money your way if it does, when I get to this point. In the interim, I will keep the PCM list around and if I catch a good deal will buy it and lend it to the program.
Heck, I'd pay the $150.00 just to obtain the information on building the harness. I know that creating wiring harnesses is semi pricey and time consuming, but paying $1k for an engine harness for these swaps is beyond absurd.