What do you all think about installing this lint trap in the rental to prevent costly duct maintenance:https://www.amazon.com/Semboh-Inline-Dryer-Lint-Trap/dp/B0FF... 

@Javier Rosales  Most of our units are single family detached house, we don't supply washer and dryers except when left by former owners or former tenants. 

We've also gotten near new units from private parties like when they are moving out of state, and don't want to move the appliances or people giving up housekeeping to go to independent/assisted living.On the other hand we don't buy washers and dryers except for luxury condos. 

Hey Zach,I am not a tax professional but I am in my 2nd househack and it is my understanding that you are correct on the washer and dryers.

Ensure all home appliances (e.g. dryer, washing machine) are properly plugged in, hooked up, and used according to manufacturer instructions.g.

I collect a pet fee to help offset the cost of any additional cleaning that might be needed for pet hair and such.

Be upfront about hair on the deal and price it to move so your buyer can still profit.

Quote from @Collin Hays: About once a year, we get a snake in a clothes dryer.  

Large lots, green space for a play area, large sheds for extra storage, an outbuilding with a full size washer and dryer, ample room to park a couple cars at each lot, fenced, street lamps at each lot, gated entry for security and privacy, community mail box, etc. etc. 

I worked in commercial construction and ran a MF division of a company. so have seen a lot of hair raising things - but for my portfolio, I like to keep it simple and stick with stuff I am confident of.