I have a client in KC that rents a large home in the urban core to a social service org in the area that feed him tenants.

Nothing you mention is "ordinary" and you should charge for all of it. dodged a bullet there thats a very good price take it from the security deposit and call yourself lucky. 

Door knock, cold call/text, mailers, social media, etc. 

House hacking is an excellent strategy, especially with the potential to use an FHA loan to secure a property with a low down payment. 

What is the security on the above?

Now, I'm imaging a scenario when every one of these tenants move out that I'll be paying their entire security deposit + interest even if there are damages beyond normal wear and tear. 

We were not able to recover any yard damages due to other damages they had left that needed repair, which empted out their security deposit.

If the management fees stay in Sch-E, it is exposed to ordinary income both at Federal and state level, which is way higher than SE taxes of 9.55% (15.75-6.2 (personal social tax already maxed out)).2.

experience: I’m on my 3rd flipage: early 40sday job: brand and web design/development retirement savings: noneI want to learn about buy and hold to secure having SOMETHING for retirement!

I'm a rookie in whole selling , I only have the knowledge that social media has and I think I understand how it works but have no idea of where to start or how its pretty frustrating not being able to provide for my family the way I want to and I could really use some advice or maybe tutoring in this subject, I just turned 20 and I want to have a good life in this economy I could really use any advice thank you so much.