Your best bet would be to skip trace the owners to find telephone numbers.  

This could include Meals & Entertainment, Office Supplies, Telephone and other business related expenses.  

I wouldn't disclose the exact address until I was the owner and the prospective tenant had passed my telephone screening.Since this is your first residential rental property, spend this time learning as much as you can about the art of landlording.

The way I see it, I have the ability to use the telephone just as any manager.  

Consider having them get an IRS Tax Transcript.Here’s what is visible on the new tax transcript:Last four digits of any SSN listed on the transcript: XXX-XX-1234Last four digits of any EIN listed on the transcript: XX-XXX1234Last four digits of any account or telephone numberFirst four characters of the last name for any individual (first three characters if the last name has only four letters)First four characters of a business nameFirst six characters of the street address, including spacesAll money amounts, including wage and income, balance due, interest and penalties

Signs for your car and telephone poles are easy and cheap.

Good idea but don't forget your telephone number.

BUT -- you will have to order a final payoff amount from your lender to TRULY know what you owe them, because you may have prepayment penalties, impound accounts, etc. that may take even more money out of your pocket.Also, as @Tim Jones said, you really need to have an experienced agent perform a CMA for you, as there may be several other things that affect value that you're not accounting for (telephone poles, lot size, location on street, etc.) that will affect your value.

I had a telephone query once from a tenant who sounded very rough.

Unfortunately I found this is why many people fail in real estate is because they think of it as a transaction and not as a relationship business And try to solve things with a program and not a telephone.