The way that the property management company I used to work for is that we charged a flat fee for collecting late rents because of the extra work it took, and then forwarded anything above that amount to the owner. 

The market went up 25-30% in two or three years than flat-lined (stably) for the next 20 years. 

Example (Buy & Hold):Purchase price: € 150.000,00Downpayment: € 35.000,00Additional cost for buying: € 25.188,00 (legal, tax, agency fee, cleaning, mortgage fee)Renovation cost: € 10.000,00Monthly Mortgage Payment (PI): € 487,34 (annual interest € 2.267,28, annual principal € 3.581,91)Tax on income: flat 21%Total annual operating income: € 16.111,20Total annual operating expense: € 6.060,00Question:How do you calculate cash on cash return (ROI)? 

Why do many investors steer away from flat roof properties?

Oakland is gentrifying and rent control or liberal politics (like 'em or hate 'em) won't stop that trend...it's just a matter who's making the money.I hear what the out of state crowd is saying, but (caution - incoming anecdotal evidence) my buddy has bought other people's midwest fix and flips with no chance for forced appreciation (in fact the building depreciates over time as housing values remain flat factoring inflation), Lower Cap rate and greater risk than I experienced house hacking. 

Hey BP! Got the inspection back. Do you think it is important in the Mid-West, Chicago to be specific, to ask for the fact roof to be coated in aluminum to protect from UV Rays? How much longer of a life span will I g...

I charge my tenants an $80 flat fee for water and trash. 

We did not use real estate agents and are using my agent as a transactional agent only for a $1,000 flat fee. 

They charge a flat rate ($3200) to list.

I just purchased a foreclosure in Walton, NY to get out of the NYC and need a flat roof.