> Let's note the absurdity of moving your washer and dryer to a new house. Those should stay with the house like refrigerators and dishwashers.

Oh hell no. You never know how the old renter treated the machines - for people with sensitive skin for example it can be a big no-no because the old renter used fabric softener by the truckload, never used dedicated washing machine cleaner (if you don't do this at least once every few months on maximum temperature, the insides of your machine will eventually stink horribly as bacteria develops an outright biofilm), or if the dryer vent has ever been cleaned.

The latter one in particular is a very nasty source of fires.