OK, I should add more to my posting above.
There have been many cases when a JW hired by another JW does a poor job, uses the wrong materials, or doesn't do the job correctly, then there is an argument, bad feelings, and the JW who did the hiring is left with a job not done,(or having to be redone by someone else), and also out of a lot of money!
And then the hiring JW can't take the worker JW to court in order to get their money back, or get the job done right, because they "can't take your brother to court."
Additionally, if they say that the JW worker did a poor job, the other JW yells "Slander!" (even if they were incompetent at what they were doing)
Some JWs take big time advantage of the "can't take your brother to court" rule.
Bottom line is.....NEVER hire a JW to do anything for you!
--VM44