Unless they also happen to be a telecom company, and are recognized by nanpa, as well as have sip trunking capacity (for voip sms), or happen to have a crap ton of gsm sim modems (true sms) and have been delegated their own npa-nxx (area code/local code) set, the number you purchase to send sms messages through their crm is actually being provided by another telecom company. 

It’s just the product code.

I would start quoting the lease a good lease should state tenants  are not to make any alterations to the property without landlord approval.  

The problem is that the real value changes block to block, not by zip code.

We also wanted to be able to set up scheduled guest codes remotely.

And the TCJA resulted in some IRS updates on section 179 depreciation and bonus which allow potential full dedcution of a roof on the property all in 1 year https://www.irs.gov/newsroom/new-rules-and-limitations-for-depreciation-and-expensing-under-the-tax-cuts-and-jobs-actSo you just get to deduct the entire roof in 1 year, and follow the revenue code.  

And how do you alter the time deadline and give a hard date in the letter -- if you have no clue when the mail will actually be considered legally delivered?       

Most companies will use the local association of realtors lease, which has been drafted by attorneys to comply with local laws, property codes and protect the landlords legal exposure.10. 

Technically my General Contractor  status is a result of pulling my own permits for the properties I own in Cleveland heights from the 44112 to 44118 zip codes as well one right up Warrensville Center Road,  I know exactly where your property is located, close to the shopping center with a Wal-Mart, TJ Max etc. 

He is just not professional and has no moral code.