They can be usefulI find them to be a headache and if it takes them time to come out, that’s bad and then if they charge you the service fee but deny the work being needed then your down a service fee plus it’s not repaired plus it took up time and the tenant is unhappy.Pros and consUp to you but I don’t recommend itSome people do though.

Ask them how much they will charge you for their time 

What I know from from looking up some info on YouTube is 1- you look up properties that have been foreclosed on2-Make sure that in auction the price sold a lot higher than what the house used to owe. 3- Contact the old owner of the house and tell them that the county has surplus fund for them ( if it was foreclosed on for $50k and it sold in auction for $75K- $25k belongs to the old owner) 4- by helping the owner get the money that he is owed you can charge a small fee?

Is it better to put min. down or 20-25% and save the rest for unexpected expenses?

The ones already doing a bunch of routine work in the neighborhood will charge you less than someone driving 45m out of their way just for your property. 

I saw in this FORBES article that Vornado only charges about $13/sq ft for the Marquis Theatre in the Marriott Marquis.

What would you suggest as means for getting in touch with the owner or whomever might be in charge of the sale?

I've been trying to get my agents license for a long time now and due to unexpected expenses and health issue it been nearly impossible to save anything.

@Romeo Kaado how are you im currently planning on attending a real estate class for my liscence,but due to my criminal past im scared to lose my money because the real estate commission is not giving me a sraight answer.My history only consist of drugs distribution,no sex charges,no violence, no theft,no robberies,nore fraud.Will that disqualify me from getting my liscence because i cant really afford to lose 400$

But if you ask me what is the most important to have when acquiring multiple rental properties with multiple tenants, I would say that the number one priority is having a very strong insurance policy structure as your first line of defense for any unexpected/extraordinary events.