No, its not a requirement to have a computer to build a plane.

Did you not read the post? Do you work for the press? With an ability to
take messages out of context like that, I would be happy to recommend you
position with any of the major media providers.

Its a requirement for someone I want to do business with. Now, if he has
built the machine, and I want to buy it, then maybe thats different. But
there is no way I would want to go through the process of trying to
communicate with a guy while my plane is getting built when he has no email.
I would likely want to see an occasional photo, so unless he plans to use
FedEx a lot, how would I get those?

Don't say USPS, don't even go there!

Besides that, someone more technical would likely be my first choice anyway,
for a new composite. How else will he get quick access to all the resources
the web offers for builders?

Unless he is the foremost expert in the field, then his lack of ability to
communicate quickly and easily with others is going to be an issue.

I really think you need to reconsider your position. This isn't high wing
v. low wing, or conventional v. nose wheel here.