Os voting questions

Hey everyone. Just had a few questions about personal bottling and private scripts. I've botted before and I know risks and everything associated with botting and now looking to try to actually keep most of my accounts.

What are the pros of getting private scripts.
How do you come across them/commission someone to make one
How do you know it's not sold to others
Who(that you might know) is trustworthy to not bug it
How do you know you are getting a quality script


General information I can get on this matter would be highly appreciated. I know it costs more and that's not the issue.