Given you said it’s unlivable, you’re probably looking at kitchen, bath, floors and paint.

Purchase Price: $39KRehab Cost: $32KARV: $100K  As you can see from the pictures, We redid mostly everything here; Windows, doors, flooring, kitchen, bathrooms and drain tile in the basement. 

., roof repair, window replacement, floor replacement, painting, etc.

WE BOTH WERE JUST ABSOLUTELY FLOORED!!!!!  

The window must have a net clear openable area of 5.7 square feet (5.0 square feet if ground floor), a minimum openable height of 24 inches, a minimum openable width of 20 inches, and the bottom of the opening must be within 44 inches of the floor.Size: The room must be at least 70 square feet, and no less than 7 feet in any horizontal dimension.Lighting & Ventilation: A natural light source (window) of not less than 8% of the floor area and natural ventilation (openable window/door) of at least 4% of the floor area are required.Heating: The bedroom must have heating capable of maintaining a minimum room temperature of 68°F.Smoke Detector: A smoke detector is required in each sleeping room.While a closet is expected in most bedrooms, the International Residential Code does not actually require a bedroom to have a closet.

I have to replace an egress staircase from the second floor which was originally made from pressure treated wood.

Because his job is 1 year term-renewable, we leased a 1000 SF 1st floor 2 BR 2 BA condo for $1500 before we knew I was pregnant.

I recently purchased a home that didn’t have heating/cooling on the second floor so I was able to negotiate a discount.

Requiring renter's insurance (separate from your property insurance) is also very important since they typically would not have the cash reserves to pay for a major damage such as water damage, ruined floors, fire/smoke damage, and you will be sued by 3rd parties if something happens to them while at the house if they have to go to the ER. 

The home has had many renovations done as far as flooring and kitchen, but the Main Bedroom and Bathroom is unfinished and the home is in Foreclosure.