However, I'm having difficulty understanding the Cash on Cash Return on Investment (ROI) for this property.One challenge I'm facing is that rental income isn't the only cash flow associated with the property.

Single-family can also be a good place to start because there will be more options but you lose the extra rental income. 

It may sound nice to pay a 6% management fee but the extra fees can add up to be more than the other company that charges 10% with no additional fees.

And built by real estate investors for real estate investors so you get the bookkeeping categories you need with no extra baggage you're paying for but not using.

They can be an extra set of eyes if anything happens.2.

I think a perfect world would be convincing the owner to sell me the properties by assuming the existing mortgage and maybe giving him a little something extra.

I guess im having the difficulties with hearing all the stories of how everyone is doing it with no $ of their own in it and I seem to get nowhere. 

Sometimes we just need that extra push to get us moving forward.

I worry that providing the money upfront (if I'm understanding the details correctly) will create potential problems down the road if people use the extra money to purchase homes they can't afford.

This renters pay on time and this will be their 3rd year to renew, they just want extra repairs to be done to property.