I cannot defend my reasoning financially but I find the non quantifiable intrinsic value of the peace of mind related to keeping and maintaining a great long term tenant over the long term is worth that lower ROI. 

What advice do you have for getting to know things about an area that can't be easily quantified?

It's hard to quantify what $20B will do for the central Ohio market, but I think of what happened near Nationwide Children's hospital when they spent $800MM...The actual impact and investment will ultimately be close to $100B. 

It seems difficult to quantify returns according to being a operations guy vs finding deal guy.

Do they have a quantifiable system to measure color differentiation?

I'm definitely going to adopt the % Confidence column idea to help quantify my range of uncertainty and see where the deal ceases to make sense.  

You have to quantify what is the RETURN versus RISK.

.#5 Practice, Practice, PracticeWalkthrough potential rehab properties (or find properties virtually online) and practice creating detailed scopes of work, quantifying repairs and estimating rehab costs for the projects.#6 Get Your First Rehab ProjectYou can practice all you want, but ultimately you will learn the most about estimating rehab costs by actually rehabbing a house.

It seems hard to quantify how much money she could generate (most startups don't do well) whereas if you rent to tenants, your cash flow is easier to calculate. 

House-hacking/having roommates is a tried and true method of building wealth as old as the hills, within which the property owner has a lot of control, low risk, and reasonably quantifiable returns.