Rental Investing Question

[Lex Miller]

Ok so I have found a duplex that I may want to house hack.  It's pricey but if I beg enough people I might be able to swing it.  Lol.  

I know I know...I'm probably not ready for investing for several reasons.  But maybe I can just get some answers to some of my questions:

Thinking of costs that I haven't thought of before...how much does it normally cost to get lease agreements made?  Can the BP family help me think of other costs involved (outside of buying and rehabbing and managing)?  Thank you all!