In Reno, NV we have newbuilds that're called "Next Gen" that have a separate in-law suite (w/ out a stove to adhere to SF zoning). 

When he is there, they always opportunistically find something to bug him about (slow draining drain, changing a filter on the stove).I have asked tenants repeatedly to email requests and they continue to text them, so I reply with email.

No, they had not.Same tenant (after the heat was "working"), tried to hook up their gas stove and said that the gas didn't seem to be on.

WD 40-,  maroon or gray scotchbrite pad..... even strokes from top to bottom going with the grain of the SS ... follow the grain pattern since it may be different on the stove vs refrigerator......

You could add one cabinet, a lazy susan, next to the drawer base to the left of the stove space and then install an island top.

However, we had a running fridge, stove, washer & dryer, and riding lawnmower.

Ran into some unexpected issues with having to run new power for the stove as well as having to run new water lines for the bathroom and kitchen.

You need him out ASAP or squatter starts removing the copper pipe, the mantle, the stove, the HVAC is probably gone.

A licensed master gas tech fixed the stove for $50. 

I don't want to deal with property managers, let alone tenants who will get on my nerves by failing to pay rent or demanding a new stove, refrigerator, window, HVAC and etc., and breaking the drywall and kitchen cabinets with sledgehammer if I evict them for non-payment of the rent.