Locating Landlord--Is this CRAZY to far?

[Paula Simpkins]

Five (5) days ago a home was posted for rent.  The  own/landlord has not responded to inquiries or inquest for an application on real estate platform (e.g., Zillow, Hotpads). It's the perfect rental for my friend.  She has little time because she currently has offers to sign leases pending for properties. She has an excellent tenant profile, but private rental home inventory is low at holiday time.

QUESTIONS:

Would it be too much to

1. locate the owner's email or phone number and then contact them?;

2. if the email or phone number cannot be found, should she try

(i) reaching out on LinkedIn, if she can locate the owner?

(ii) leave a note at the rental property (it's vacant)?

(iii) leave a note at the owner's home that is nearby (she found using property records)?

Would this irritate the landlord and cause a hard NO--too creepy!