Because in reality, by not hiring a property manager, and committing to doing the easier things myself--like unclogging a toilet / shower drain, fixing a light bulb, pest control, calling a plumber--I am committing to be on standby for many hours, which is a sacrifice of peace of mind / being able to leave town or take vacations--and I would like to know if it's worth it. 

Now for example, if there was a half-bathroom already there and you just want to put new shower tiles, toilet, vanity, etc. that's one thing (you could probably get away without doing a permit).

Storm sewer not the one connected to the toilet.

So now we have conditioned when a person leverages self to the gill's, taken on mountains of debt and the grand some of there career is waiting tables or making coffee and some toilet-paper degree that a bajillion others also have, and maybe a few years experience at best. 

Is cleaning up garbage, scrubbing toilets, fixing broken sinks, carpentry or any of those the highest & best use of your time? 

Infact, it's advertised online with the Realtor.com site showing all the amenities of my apartment, the electrical, the plumbing, the windows, the door, the shower and toilet and even the kitchen sink so obviously it must be legal because I can't see an agent of his caliper risking his career and livelyhood for undisclosed info.

You don't write up a letter to the tenant unless you want rocks down your toilet.

Another thing to consider if an overflowing toilet or pipe breaking occurs on the top unit, both units will be affected so that's something to consider.

Wired internet cables for laptopsObviously towels, toilet paper, shampoo, body wash, etc in every bath Keurig for coffee if they'd like someGym in basement Washer/dryerLocks on every bedroomMaybe even a fridge full of beer and water

Other places a landlord who enforces a late fee for a few days delay will get concrete down the toilet and tenants who leave chaos behind in revenge.