Appraisers can't tell unless they've been in lots of comps themselves whether an "improved deck" in that area generally means an outdoor kitchen, pergola and fire pit with high end appliances or a $500 grill and an aluminum sink in the corner of a bare deck. 

But one was a smoker.

One of my tenants has an old oil tank mounted on a small trailer that he uses as a smoker.

Hi, I’m looking to invest in a duplex where the previous owner was a heavy smoker.

The wind took the cashier's check from his hand and it got sucked up into the 18 wheeler's grill. 

It has its own office, laundry facilities, BBQ grills around the perimeter, etc.

.: It's an oil stain from a grill that can probably be cleaned off.

I propane fire pit and a BBQ grill would be nice. 

I've been building my business policies over the past few months, so I'm sticking to standard qualifications (income 3x rent, no smokers, no crime, etc. etc.) before processing any applications.

Butler's recommendation is to rank people using a score that involves criteria that are not protected classes (neat & clean or not, smoker or not, etc..) and then rank them.