Odd behavior from electrician?

[Nat C.]

I met with an electrician about upgrading and updating all the electrical at my house. He sent me the quote the next day and I agreed. That evening he turned up at my house to collect $500 cash to buy materials. I said I wouldn't be handing over $500 until he physically turned up with the materials to start the job. He became quite angry and said he wouldn't be spending his own money to buy materials. I said no problem, I would meet him at the supply store and pay for all the materials. He left in a vexed state. Spoke to him the next day and he said he's not doing the job because I don't trust him. He's correct, I don't trust any contractor in South Florida.