Should it take a while to get supplies to rewire a 1100sq ft house?
At the risk of throwing someone under the bus, NOTHING he would need could not be acquired at a real supply house (or even home center) in less than an hour and totally in stock. Even the ethernet cable (typically Cat5e) is nothing special in bulk and ANY electrician worth his salt should have the tools and be able to terminate.

I get the impression that he overbooked himself and needs time. Unfortunately for him we have the internet, so his excuse is easily debunked.