Management companies exist in a variety of fields for sound reasons. Real estate owners, for example, will hire a management company to collect the rent and deal with maintenance of their properties. Professional practices may use management companies to allow non-professional owners a stake in the practice. Sometimes, though, management companies are not for a real business purpose but rather as a device to shift income. It often does not end well as we will see.

How Should a Disregarded Single Member LLC File a W-9?
Although Form W-9 has some other purposes, a company will usually ask you to fill it out if you are a business-to-business service provider . If you don’t provide a TIN to your customer, they may have to subject you to backup withholding . If it is my company that asks you for the W-9, I am not going to do backup withholding if you don’t send me the W-9. I’m just not going to pay you until you cough it up.
I believe in learning from experience. But it is better if the experience you learn from is other people’s experience. That is why a very large percentage of my tax writing is from court opinions, most often the United States Tax Court. This piece is my own experience.