[donthekawguy]

I just stumbled along this thread and love it! What you could also do is go to different pay phones and call him and make appointments for him to come out and give you estimates on work to be done at "your" house. Give him a fake address and wait down the street for him to show up. Then you will know what he drives and looks like. And he will look like a jerk off going to a persons house saying he spoke with them about having work done. The phone he is using is obviously his company phone and he can't change the number so use it to your advantage.
The idea about the bat is a HUGE mistake! One call to the cops and whoever had the bat in their hand will be in jail that quick. Also, do not record any conversation you have with him on the phone. I believe it is a felony in WA and you would not be able to use it in any kind of court. How about an update?