Value per door when acquiring a PM business?

[Tray Ross]

I am interested in purchasing a property management business out of South Carolina. It is a short term vacation property management for the most part, and there are 62 doors. They valued the company at $675,000. However, Using the gross monthly net per property, with a multiplier of 1.8 and then multiplying by 12,  I can’t fathom this $675,000 number.  I can’t understand how they valued their clients at about 10,000 each. Is this wrong?  The gross revenue is said to be 1 million.  So what would be a “per client” cost?   We are only in business two years and I want to start acquiring now.  Thanks for helping this newbie!