They sell product only in many cases, and if you are working with someone you must apply some critical thinking and skepticism to their advice and see if it is in your best interests.I frankly get annoyed when I see and hear comments about high compensation of insurance agents as an argument against using it, as that is really not relevant if the ultimate solution is good and valuable.  

For walls I spray with one of the various neutralizers for pet urine on the walls. after dry,  follow up with a vinegar solution.

There are solutions for regular noise issues that don’t involve the landlord.

You need it to be a great deal and be very very quick on your rehab to make those numbers work.Another solution is to stay in your current home a year, then turn it into a rental and buy another house that needs work with a owner occupied rehab loans. 

But unless you are running flat rate prices and never updating photos, descriptions, messages, guest books, etc, this seems like a greater than $0 cost without a PMS solution.

This is my first REI property, so I'm trying to find cost effective solutions to this matter.

It seems like become Broker MLS-Only might be a solutions (getting MLS and lockbox)?

That being said, with today's partisanship, that would be a complete trainwreck so there doesn't really seem to be a good solution. 

The price tag on this archaeological excavation was enough to make you want to dig your own grave right there.Eventually, we worked out a solution, which included selling the parcel and providing the buyer with a credit and putting the onus on them.

At that point, it's worth researching and finding a solution that better meets your needs.