Never hire a tweeker to do anything at your house. They will rob you whether you are there or not. The best way to find a house cleaner is through friends who have used the same person with satisfaction for a period of time.
If you know/trust this tweeker and pay after the job is done then I see no reason why not. If its a stranger tweeker then I would have to say no for 100 bob
Excellent idea. But I wouldn't be too demanding. They might only clean your stove (of course it would sparkle) or they might just take the money and run.