One item to consider if folks wanted to duplicate my existing megasquirt/EDIS (ford wasted spark ignition) setup then the tuning part becomes a whole lot easier - I have a running/driving tune up which I'd be happy to share. If you know how to post a picture on the internet, then you can install this tuneup file into a meagasquirt. It really is that easy.
As far as special tools need to install a system - if you know how to find TDC using a degree wheel and a positive stop thats as hard as it gets.
Know how to read a digital volt meter for volts and ohms? Its my main piece of test equipment that I use if I run into a problem.
You only need to set the base timing once with a timing light - the rest is done from the laptop.
Tuning - even folks that have never tuned an EFI system before - within 30 min's they have enough confidence to take over and dial in a basic advance and fuel curve.
Unlike the early days of tuning where information was tough to find and was not shared its change a lot.
These days the only time I'll use a carb is to break in a flat tappet cam motor that I DO NOT have a viable EFI tune up for. It just gotta fire and run. Once the cam breakin is done the carb come off permanently. If its a roller cam motor then I can afford to get the EFI dial in sinceI won't wipe the cam out.
Back to the question at hand though - what is it going to take to get enough interest if EFI is really not your thing?
This engine does have my interest. I would also be more interested in an old school conversion for this engine, as noted earlier, possibly with a single Holley carburetor and without a computer.
Although, if the complicated parts could be simplified, it would be tempting to at least consider an EFI set up.

Sure sounds like a heck of a lot more fun than the usual V8 set up. But, as for now, I am just reading your post's and sort of thinking out loud (online even). But if you seriously think about it, this could very likely be the next rave.
John