Nathan I appreciate the reply and I want to address what you said.1.

That is to say, it’s a requirement/recommendation for everyone who ever wants to go there in the winter, not just our one driveway out of 2000 addresses. 

I am looking for address and phone numbers, not one or the other. 

- If you're acquiring a property with tenants then I would need to send you a separate list of about 50 items to address hahaha Hope this helps.

Would appreciate any tips, especially some clever way to find out their current address.

Mortgage company loan number address or their assigns...

Do you think it would be worth wide to start finding addresses of these units in areas I am comfortable and sending direct mail? 

If it were me, I'd address a few things before deciding on a market.1) Personal finances - as @Nathan Gesner mentioned, if you don't already have your personal finances in order make sure you get that taken care of.

If you don't feel comfortable amending a line or two in a Word document for your lease to address a possible change due to covid, then I would shop attorneys for price. 

As the business owner/landlord you have to address the problems and be flexible (not over extended).