It is more likely that they used metal utensils on non stick pans or it could be from a steel scrubby pad.

Some ideas: 1) put mini fridge, desk, chair, wardrobe, bed in each room. 2) Buy all common stuff such as toiletries, kitchen utensils, cleaning stuff.Cleaning: Arrange cleaning service twice a month at landlord's expense, this not only keeps the house in great condition but also can be leveraged to inspect the house.Laws: City of Seattle allows upto 8 unrelated persons in a SFH, so does Redmond and Bothell.

It is a lot.Here is some items:Furniture and stuff to hang on wallEnd tables and lampsSheets, mattress and  pillow protectors, flatware, knvives, plates, cups, glasses, pots and pans, cooking utensils, spices, paper products like TP and paper towels, towels, washer and dryer is good to have.Internet and cable or Satellite plus nice TV, or more than one?

Furniture – invest in comfy couch and mattressesBed and bath linenshairdryerCooking and baking essentials pans/utensils/measuring cups and bowlsDishes, glassware, flatwareAppliances (stove, oven, microwave, washer and dryer – dishwasher would be nice too)ToasterHandheld mixerCoffee pot or KeurigVacuum CleanerBroomSmart TV with streaming tool (Amazon Fire stick works well)WiFiToasterCoffee pot or KeurigFurnished Finder provides some basic demographic information on Traveling Medical Professional demand for most cities.

Stock the kitchen with all the necessities... enough cookware, crock pot, food processor, blender, all needed utensils, etc etc... anything you think you may need, provide it and it will go a long way with guests, especially in reviews. 

Get a washer, dryer, fridge, stove, cooking and eating utensils, plus whatever furniture and bedding you can get at an auction or garage sale. 

Don't skimp on the plates and utensils.

It uses  almost any writing utensil. its not fast, it writes at human speed. 

Only common areas and basic kitchen utensils (pots/ pans/ cups/ plates/ etc). 

Well appointed furnishings, nice kitchen utensils and appliances.