If you are going to update it, I would replace the windows and sliding glass doors.

But after we had tenants whose various dogs ate my porch swing, the plug off a window air conditioner (haven't a clue why the dog didn't fry himself on that one), dug holes in carpets down to the subfloor, ate the bottom off a closet door, chewed open a door and got under the house in the summer heat to stay cool and crushed a duct pipe and (in one case) were kept under the house so I got to clean feces and urine out from under there on my hands and knees....we rethought our  idea of the need for a pet fee.Gail

Neighborhood is mix of rental and single family, with SF homes showing strong appreciation.Given all this, if you wanted $100/door, what would you pay for this duplex?

Sheetrocking over old lead paint would rarely be an economical solution if the room has doors, windows and trim....which most do.  

A home can sit and sit and sit and sit, until the seller either make more improvements which they usually never ever do or drop the price.

If I had the deed, from a DIL, they went out the door a little higher.

I'm sorry to here about your career change, but sometimes when one door closes, another one opens right?

I have used a company called 40 offset based in chicagoland they charged about 300$ for 1,000 6x4in full color two sides to the door I just supplied them the list.

Plus for long term lets you could go to Neo Irakleio which is just "next door" to Marousi with cheaper properties and much more convenient train and bus connections.

What is a reasonable cash flow per door for a house hack?