If all you need for your business is a "virtual office" (tied to a physical office location) for mailing only, with 24/7 access of your physical mailbox and if needed, your mail being forwarded via USPS first class without charge, I have a solution for you, which is $45/month, and can be canceled at any time by stopping sending me the $45 monthly due. See the attached picture showing the physical mailbox.
You would be assigned a secure numbered physical mailbox and would be given the key for the mailbox and access code for office entrance door for easy 24/7 access of your assigned mailbox.
Here's how it works: whenever a mail piece of yours comes in, I will email you a picture of the envelope. And if you are too busy, or too far, to pick up your mail pieces, I can forward the mail piece(s) via USPS first class with tracking at NO cost to you. Otherwise, your mail pieces will be in your assigned mailbox for you to pick up, which you can do 24/7.
Real simple, and no gimmicks. I am in the office pretty much 7 days a week. So usually there is no delay in terms of sending you email about receiving your incoming mail with one or more pictures of the incoming mail piece(s). All my current and past customers can confirm to you that I am reliable.