What you can do is have USPS hold your mail for pickup once a week. They should be able to set it aside for you, segregated from your neighbors' mail. You can even pay them a few bucks to mail it to your work address once a week.
What I now did was having my mail forwarded to the leasing office as they suggested. But I've heard that it takes up to two weeks to process this? And that still means I won't get the mail that's "mixed up" at the post office now.
I'll still write that mail to the manager, maybe he's kind enough to give me a discount or something. Grrr.