In fact, the properties on either side of the house are commercial - one a house that was converted to a nursery school some years ago, and on the other side, a former gas station that is now major wireless carrier's cell phone store. 

Because your walls are sealed you will need to use an open cell foam. 

Commercial property being used as a cell phone business.  4 years left on lease at $2000/month rent.

Shoot me a quick PM and I will leave you my cell.

Box; rent can only be paid by 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 <Google voicemail>, 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.

I give my tenants my cell number so they can text me anytime.  

I dont put all my eggs in 1 basket

I use a google voice number to forward the calls/texts to our cell phones.

I dropped new-owner notices and 30-day lease termination notices at the entry doors of all tenants.However, one tenant does not have a job, cell phone, nor electricity.

My tenants have a Google Voice number that goes to my cell phone.