These factors minimize your risk and ensure that you have an investment, not just a rental. 

I was worried that the same home would be a competiting comp when it came time to sell but maybe that won't be a factor considering the amount of work we have done. 

But it all really depends on LTV, credit score, and a handful of other factors.

We had factored the cost of the repair into our original offering price and the seller was unwilling to negotiate further.

Thus conveying any 1 said property to a specific person/entity for utilization but retaining asset in a trust for various factors. 

And even then, i'm not sure this calculator is factoring in the opportunity costs of not earning 10% ROI on the stock market 

Columbus has ranked on the top 10 markets that outline that for the past 6 months at least. the best place to buy new builds is in higher priceopint markets but where the costs haven't gotten out of control. besides that I'd recommend working with a vertically integrated land development, real estate development, and new construction firm or design build firm who also understands market conditions. 

There also might be other legal/insurance considerations you want to factor in as others have pointed out.

I completely agree—there are many ways to integrate good design into a more accessible space without increasing little to any cost.

Now depending on how this property was reported in the past, the agreement the two of you made, and possibly other factors this answer can change.