What I do on centers is look at the size of the center.

By 2009, C+ apartment expenses in Houston were running about $4500/door/year for the apartment size I was targeting.

It really doesn't matter what size or where it is.

Did the city say that your property is zoned for 2 houses on a lot of your size or it is a large enough lot that it could still be conforming if you subdivided?

For instance Texas has enacted a law covering contract for deed which, among other requirements, mandates a recorded transfer of title once the equity portion hits a certain percentage of property value, and mandates disclosures written in a specific type size, as well as various other rules.  

Since this post specifically states SFR that is what I will be referencing as small multi-family and apartments will differ quite a bit depending on size and value.

They come in all shapes and sizes, too.

You control a pretty decently sized asset and they tend to rent exceptionally well.

., and garage.Once you know what the common costs are for each area for a specific size home, you can see how easy it will become to walk in and walk out 15 minutes later with a rehab figure in your head.

Those that have other models wlll have much different ways of accomplishing their goals and making them bite-sized.