Our compromise was to design the upstairs to be like a private in-law suite so it could be rentable on Airbnb when we choose to do so.

S8 is designed to keep certain people financially dependent and financially illiterate.

Can anyone recommend a design build company that would handle any zoning needs with the city, as well as complete the construction and leave it rent-ready for me? 

After posting I saw in your profile you are a software engineer.....What would be REALLY cool...If you could develop an easy to use Gantt chart software (Think Microsoft Project, but WAY easier to use) that was designed specifically for Real Estate reno / BRRRR. 

Please note the information provided below is a layman's definition designed to provide a basic understanding for the general audience.

We do complete kitchen and bath renovations and re-designs often down to the studs which far exceeds a typical turnover renovation where you'd maybe do minor repairs, paint and lay floor.I think I could probably manage 200+ units using Buildium property management software (or some other full featured app) without breaking a sweat.

I like land locked areas and urban markets as do most firms. look at where banks buy buildings. mostly 20 story buildings in downtown markets for a reason. asset protection and preservation so we try to do it as close as possible. there are lenders in columbus that do 100% hard money financing for renovation loans that based on experience make concessions to experience operators. we are vertically integrated though for design, build, entitlement, leasing, and brokerage so there isn't much missing. licensed general contractor. 

And while I was able to increase rents substantially, the making the garage a garage again, also involved a full gut remodel of the rest of the house, so the design and newness certainly played a big roll on the rent increase.Second case study, my wife and I recently bought a flip.  1960's built, four bed 2.5 bath house.  

So far, he said responded to some of this questions with, “All new interior remodel, new electrical, new plumbing mostly new HVAC. $120,000 spent in repairs over the last 4 months.

You need a survey to start your design process.