For me, this would mean asking about pets (we don't allow cats of any kind, or aggressive breed dogs, or dogs over a certain weight in our condo units that have HOAs that prevent it). 

Put a few, weighted, around the yard for a few days.

Good property managers are hard to find and are worth their weight in gold

Second is one family could be built to a different standard than a two family house, would not be able to bear the weight of an additional floor.

We bought 8.The auctioneer rapidly goes through the properties the 300 property sale is over in 2 hours, you need to pay strict attention or the property you're interested in will be sold or passed over before you know it. 

Chapter 6: Save $1,000 Fast: Wall before you Run Eating an elephant, like losing weight, requires doing small steps with vigor.

If you have insight on the Grand Rapids or Lansing multi-tenant rental markets, please drop me a line.

I ask because, as an investor and business owner, it seems to me that I would give weight to {the real} cash flow from operations.

Most of the partnerships I've done here in Grand Rapids, MI are based on either a straight debt position of ~10% (usually for smaller deals, and depending on how many we've done together in the past.

Personally I think all that macro stuff has too much weight behind it.