Ask to speak with some of their current owners and current/former tenants.

Most quality product is trading in the 5's and 6's. 

My concern would be getting quality property management for that 10-20 unit. 

They are a local company that builds houses from the ground up who do quality work without cutting corners.

I will start talking with someone on here, over email, phone, etc. and then we may not have a reason to speak again for a bit and I will then, many times, forget that I had wanted to touch base with that person again until way later.I work a lot, so things slip my brain pretty easily.

As always, speak with your attorney before you do anything.https://youtu.be/bz8bqJaKeKk

We did a good quality job in Baltimore City. 

@Sean Doherty, As @Anthony Thompson stated, a generic septic is generally speaking in the $10,000 to $12,000 range for a 3 bed.  

@Joe Splitrock I'll have to look at those bridge loans again; I remember looking at them last time we sold a home and the feasibility was rather lacking in the US relative to places where they're more common like Europe (in speaking a family member across the pond).

Finding good contractors has always been difficult, its the hardest part of this business, and with new home builders working again they are sucking up a lot of the quality people and driving up prices.