The chief economist quoted in this article says that Columbus continues to remain one of the strongest housing markets because of its population and job growth along with its affordability, and adds that, “Columbus homes may seem expensive for people living here, but it’s very affordable compared to other markets...”As a resident and investor, I found this article extremely encouraging, and if you are a RE professional in any capacity within this market, or if you're considering jumping into the Columbus market, you should be encouraged too.

With well & septic, you have to be extremely careful and diligent to ensure tenants do not flush anything improper or allow the plumbing systems in their homes to get backed up in any way.

Indy is a great SFR market but I would be extremely cautious with MF. 

The other reason is I found it extremely difficult to juggle educating myself on real estate while attending Army Flight School training.

No issues renting, the rental market here is extremely robust and you won't have a problem with finding tenants unless you're in the luxury market.SFH/Townhomes tend to hold value better than condos, but ones with associations do tend to hold their value than ones without.

There is no profit in them and extremely difficult to just break even.

Consider yourself extremely lucky.If you want a crash course in wholesaling, which is sounds like you need, there's a short book that outlines the whole process.

But be extremely conservative when buying from there.4. 

At first glance, it seems like area crime is EXTREMELY high.

The problem that makes a 1031 extremely difficult is the 45 day window.