The trade-offs are it can be harder to find tenants.Generally for a SFH rental you will want a property that is about average in size and lot size, if not slightly below. 

@Brandon Nappi looks like a very large addition compared to the current size of the property.  

You will get better advice if people know what size building you are talking about.

Additionally, depending on size of the building/units local code may require fire alarm systems requiring monthly monitoring service and a dedicated phone line.On the flip side (income) is there an on-site laundry, storage locker/rooms for other income sources?  

Multi units are hard to move as your retail buyer's list is about 1/20th the size of a conventions SFH.

The most important market factors I look at are the stability of the market's economy and population size, as well as the rent-to-price ratio (discussed later). 

Be careful listening to Ben Leybovich His Schtickle is not one size fits all.

The bank might make the shape and size to maximize their exposure and get the most parking etc. and leave you unusable land with the shape that is left over.

News spreads quickly between agents (especially in mid to small sized communities). 

And his deals have been increasing in size.