I would definitely talk to a contractor to understand what your build costs would look like. 

In this manual (which I assume could be modified to provide to tenants) I include all the financing information (which you would not include for tenants) bank accounts, mortgage accounts, payment information, and mortgage payoff), a list of the contractors, what each contractor does, a list of upcoming planned or necessary repairs, and a copy of all leases associated with the property.

It’s also worth connecting with a property manager and contractor early, even if you don’t need them right away.

I am hoping this number is extremely conservative given that our contractors, inspector, and realtor walked it as well. 

That is who you want.The best contractors will never, ever be on Yelp.

I am looking into buying a duplex in Hyatt Park and wanted to get some advice on what contractors/suppliers I could contact that have investor friendly pricing for kitchen cabinets, countertops, and bathroom vanities.

I would add to this one pound into you the good relationships you have with the contractors and agents in your area will be your best and most helpful relationships.

Are you buying this property for redevelopment?

First, it fast-tracks your learning as an investor - you are forced to develop better time management skills, build your network of reliable contractors/ handymen, etc..Second, when you are ready to transition to a property manager, you are well equipped to evaluate and hire the right company.3.

There was no emergency shut off switch before but i asked the hvac contractor to install one and he did ( located inside the apt).