These are professionals with additional training and a stricter code of ethics.

You can purchase lists with different motivations like absentee owners, 60-90-120 days late on mortgage, pre-foreclosure, delinquent taxes, water cutoff, code violation, evictions, probate, divorce, etc. and mail or cold call.Other methods are driving for dollars, door knocking, wholesalers, craigslist, Realtors, FSBO sites, expired listings, put out bandit signs, billboards, newspapers, other offline publications.You can use pay per click/adwords, motivated seller website with SEO, facebook, Linkedin, Youtube, and other forms of online and social media marketing.If you have a big budget you can do radio, TV and billboards.

Name, City State Zip code and (if you have it) phone and/or email can be uploaded.

For internet leads the best bet is to get a site like Carrot.comYou can also purchase lists with different motivations like absentee owners, 60-90-120 days late on mortgage, pre-foreclosure, delinquent taxes, water cutoff, code violation, evictions, probate, divorce, etc. and mail or cold call.Other methods are driving for dollars, door knocking, wholesalers, craigslist, Realtors, FSBO sites, expired listings, put out bandit signs, billboards, newspapers, other offline publications.You can use pay per click/adwords, motivated seller website with SEO, facebook, Linkedin, Youtube, and other forms of online and social media marketing.If you have a big budget you can do radio, TV and billboards.

Which areas (good zip codes) for B class sfr and multi units?

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.

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.