If they don't have one, you can buy used in our market for under $150 a pair, so not a deal breaker for qualified tenants. 

@Will F.For 8 units one set or a pair of each would more than suffice.

Hi Chris, we manage properties in Albany for clients living all over the country, and we find the biggest challenge for many owners is just the psychological challenge of turning the reigns over to a property manager, since many feel obligated to stay involved in day to day operations even at a distance, which generally doesn't pair well with professional PM. 

More than one pair of eyes looking at is never a bad thing.

You need to pair up with a knowledgable Realtor who can walk you through the myriad of options in the market.  

Passive Income (usually paired with traveling)

Pros almost always work in pairs. 

Hey John, it would probably be good to go through all of them with a fresh pair of eyes as I might have missed something. 

Once they learn that you are a safe pair of hands, they will be more open to funding deals. 

People always want the FHA rate paired with the Conventional mortgage insurance terms, and Conventional's lack of UFMIP tacked onto the loan balance... nope, it's a choice between Basket A and Basket B.