Sharing walls with a noisy family with children or college students for example is not going to invite conflict and may cost you in poor reviews or guests wanting to leave early.

You shouldn't wholesale deals on market as it's a conflict of interest. 

I've seen conflicting information on when/whether these costs are deductible — most, including Pub. 536, seem to apply to the *purchase* of a rental property, and resources that deal with sales have focused heavily on either straight-up sales with capital gains taxes or on 1031 exchanges with deferred gains.

Any tips for fostering open communication and avoiding conflicts over time?

General Contract Language- Broad language allowing PM to receive and collect fees from tenants so long as it doesn't explicitly conflict with said agreement (meaning any additional fees can be added even if not in contract)?

Make sure your decor fits the theme of your area, or at the very least don't have anything that is in conflict.

When I did some online research I was getting a lot of conflicting information. 

It's not at all unusual for companies to have conflict of interest and ethical contracts or stipulations for its employees or associated vendors. 

My cause of conflict is that I feel like I am getting a great deal because of the price reduction I got.

As an avid reader of all things financial, I’ve always found the conflict between Ramsey and RK hilarious.