Yes it's cheating but I could see all of their builders doing some free hours here and there. And the skirting of various rules.This is not skirting the rules. It's against the rules. It's cheating. To do this gives the contestants an unfair advantage over the others.
Or maybe they were working at ungodly hours and you would charge 150 an hour but do it for 55 an hour.
I doubt the show half way through all of a sudden looks at the trade bill and goes... oh maybe this is suss.





