Plus you need to keep the place really really clean. 

You mean the title insurance that I got from my attorney when I purchased the house  saying  that the title is clean?

You can run numbers using comparable listings in Airbnb and VRB, etc, estimating startup cost to mortgage, insure, furnish, staff (cleaning, landscape, etc), and utilities and supplies.

This is exactly why I don’t bother to show houses/advertise until the property is empty and fixed/cleaned and ready to go.

So I don’t think it’s too bad for first deal.I had to inquired some cost like cleaning and paint, etc.

Also, my homeowners association requires our dryer vents to be professionally cleaned every other year for about $100.  

Although they did clean the carpets.

I was able to talk with him and he gave me a couple hundred dollars, left the unit broom clean and moved on. 

Toilets aren't worth it, because they are like $100 new and the effort to remove the toilet from the wax ring without breaking it and then cleaning off the wax ring to get a good seal when reinstalled just isn't worth the effort. 

Then warranties and legal recourse for work has a clean paper trail from who paid to who did the work.