As an aside, the old management company (that I terminated a couple weeks ago) gave the tenant my personal cell phone number so I got a call from her yesterday which was awkward and highly unprofessional. 

I work a full-time job, a side gig as a food delivery driver, moderate for BiggerPockets, gym, family, friends, & etc, but I still self-manage my properties usually from my cell phone, lol!

Comparing Verizon (one of a handful of cell phone providers) and a PM company, which is ridiculously competitive industry, is comparing an apple to an orange.

You buy a indoor camera , use the signal from the cellphone for wifi.

Box; rent can only be paid by bank deposit.For your convenience, the nearest location to your home is 123 Main Street, (City), or you can execute a bank-to-bank transfer using the routing number provided.If you have any questions, concerns or maintenance issues, you may call or text my cell phone at (your business number), or you may email me at the address listed at the top of this notice.Please don’t hesitate to contact me with any questions about this transition or any other pertinent issue.Sincerely,(you)

additionally sometimes the listings are just garbage, cell phone pics, or no pics, and limited info will easily make a listing sit. 

If you have a cell phone you have no privacy.I am Not talking about an owner occupied borrower who lost a job but can go back to work and a lender gifts a modification.Many of these subject to deals with investors the original borrower is not paying, the sale price is inflated, there are seconds and thirds who won't have the money to payoff the first, and the "investor" has no reserves or team to deal with: code violations, a fire, non paying tenant, is far away from subject...

Don't be just another vanilla (forgettable) $190 ADR listing with cell phone pictures, no SEO and the same hot tub and fire pit as everyone else. 

Thinking my cell phone is not working and maybe I missed some emails, I went back home to check my emails on my laptop and did not see a single email from them.

You should have the cell phone of anyone you deal with regularly and they should have alternate points of contact if there's a conflict that keeps them from handling your file personally.