@Anna Milligan I would not eliminate the $35 application fee under any circumstances.I am sure experts in the Columbus market will chime in and let you know if the rent per month makes sense for the area.Maybe give a little more information about the bedrooms/bathroom breakdown, type of house, etc.  

See also http://www.egresswindows.com/its-the-law Seven foot ceiling heightSeventy square feet of floor area, not including any closet areaA source of natural light (8% of the floor area)A source of natural ventilation (4% of the floor area)Can not be arranged such that access to a sleeping room can be had only be going through another sleeping room or a bathroom or toilet room.

-New roof-New windows and doors-New hvac with AC-New laminate and carpet flooring-New bath, tile, vanity, tub, fixtures etc-New shaker cabinets, quartz tops, kitchen fixtures etc.

She may not know a new HVAC system costs $8,000, or kitchen updates might cost $12,000, or bathroom updates might cost $6,500.After knowing her motivations, and informing her, you'll know what would make her agreeable to selling to you. 

I was wondering what buyers prefer in Master bathrooms.  

The policy covers only legal liability for damages to the landlord’s property (covered losses include fire, smoke, explosion, water damage, backup or overflow of sewer, drain or sump, falling objects, riot, or civil commotion) up to $100,000.So when that tenants overflows the tub and nukes 3 bathrooms below it with water damage, that get's covered under their Tenant Liability Insurance to repair said damages.

Just realize, you're buying 4 units, so it's 4 full kitchens, 4 water heaters, 4 bathrooms, etc.. so just be ready for stuff to go wrong, and have good $$ available, and you're good!  

Phillip:We use a variety of liquid, moisture, and humidity sensors with our building monitoring set-up to detect leaks (or when a bathroom fan or the HRV needs to be switched on) and have begun incorporating them into our renovations.That said, with the exception of humidistats on bathroom fans, the best offence we've found is prevention.  

I have completed projects ranging from a custom kitchen backsplashes to complete bathroom remodels.  

Bathrooms were in good condition as well as most of the paint and ceilings.