How old are the various components on the house, what are their remaining functional life span, and figure out the costs for them.

Can you imagine getting an unexpected hit of $108,000?!  

They are one of the main components in the changes we see in the housing industry, and will continue to be for years to come.

@Drew McLaren  there is some exponential component on larger loans as you state howeverhere is how I looked at it over the 30 years of loaning hard money.IF your in a foreclosure situation.. the value of your collateral is generally not what it was when you started the loan..

Obviously the income stream would be split 5 ways, but so too would any maintenance costs, thereby reducing the overall risk of not being able to meet any unexpected bills. 

If you are using hard money you need to budget for the points and fees as well as traditional third party closing fees.Repairs: The money it is going to take you to rehab the property plus an extra 10% of estimated repair costs to account for unexpected repairs.Holdings Costs: Here is where a lot of investors get tripped up.

For good cash flow... look for bigger deals, with a value add component, in which you can afford to use on-site property management (at least 75 units)...

In full disclosure my business partner is the President of the REIA and I am an active component in it as well, but it is a great place to network and learn new strategies and skill. 

As always try to have a little reserves for unexpected fixes .

Both systems have a FREE component Cozy is TOTALLY free.