It may work both ways but the street is much wider on their side. Like autobahn wide
I know, but sometimes the greed gets you and you do the job anyway....... I think we have all met 'that' client, but fairs fair, there are also bad engineers too, so it works both ways!
Always go with your gut, some clients just aint right. Walk away if your in any doubt. Ive been stung hard before, dont let it happen to you