Typically a duplex will offer twice as many problems that could arise. 2 kitchens, 2 bathrooms, 2 water heaters, 2 furnaces and 2 tenants.

Doorknocking, mass mail, mls, cold calling, social media, etc?

I've had a cold-call-driven lead generation model since 2018, I've spent enough time on the phone with rental owners; my gut is telling me that many of the less sophisticated and amateur investors will take this as a cue to step away from properties that haven't been all that profitable for them anyways (due to operator error).Regardless, I'm still buying in Cincinnati.

I hope this doesn’t sound to cold but there’s a lot of opportunity.

Water heater is not installed, (It is just sitting on the kitchen floor)2.

I mean changing furnace filters, water filters, yard/lawn maintenance etc.

The end goal is to have have to have enough parking for a single vehicle per unit, to separate the water and electricity, and to convert the single family into a duplex. 

It is a SFH so I do not have 24 months of utility records but the average is around $450/month for power and $100/month for water. 

If you bumped each of those up to 10% as well, I wouldn't object.I'm also curious whether you're sure about the electricity, water + sewer, garbage, etc. 

We inherited a tenant that wasn't paying unusually high water bills, and ended up leaving and breaking the lease in September.