I'd budget for a monitored cellular alarm system & put my rehab into warp-speed to get it finished & secured ASAP.

Cellular when I was in high school.

Or you can pay more for cameras that either have built in cellular unit that handles all of this for you.2.

If it were me I'd either call his cellular about an hour after lunch, but not too much after and just talk and find out what HE means by this.Then ask about grabbing a lunch somewhere together tomorrow--he might want you to work for him too--so be ready for that.I say that because you have to know your trade if you are going to contract, and some require a licence and X years as an apprentice.Good Luck!

Will purchase all rooftop cellular lease agreements for large cash lump sum and remarket location to add additional carriers

Just be aware that you will need internet service, although the Ring alarm wil connect over cellular when wifi is lost.

Lack of a cellular phone would mean a big change.

A few questions and challenges there . . . we had the same issues when we lived and invested in the Detroit area.1) As far as protection of remodeling material, you can get a security system designed for that application such as the Ring Jobsite Security System which has motion and camera capabilities with built in cellular notification. 

I’m sure most of you are familiar with 5G connectivity. 5G will not only be faster, but it will also serve as the backbone for driverless cars, safer surgical medical procedures, safe drone operation, less traffic jams on the streets and increased precision in manufacturing.Think about how much progress has been made since 1G. 1G connectivity allowed us to talk on the phone using cellular towers. 2G added text messaging capabilities. 3G introduced internet capabilities. 4G made all of the previous features even faster.

Some of the internet would need to be cellular based.