Columbus is your best bet, it has seen great appreciation with many new jobs being created from large expansions by companies such as Intel, Honda, Amazon, Nationwide Children's Hospital and Wexner Medical Center.

This is due in large part to major corporations like Intel, Honda, Nationwide Children's Hospital, and Wexner Medical Center investing heavily in the region and creating numerous job opportunities.

You could set your sights on a small SFH on the west side that is in close proximity to the Xcel center, W7th corridor, children's and regions hospitals, etc. 

Illegal sanitary water work destroys property, hurts people (typically children and the elderly), leads the news, and makes top local politicos look like they can't get their thumbs out.So the problem with not pulling building permits (with special attention given to plumbing permits) if you're in this business for keepsies is that sooner or later, the odds catch up to you, and once they do, your name is mud and your career as a landlord is over.

You'll have to pay that to the IRS and your children will inherit the rest. 

We did not specify regarding trampoline in the contract, however we have clause "House furniture, cloth furniture and children’s toys are not permitted to be left out on a porch or in a yard at the end of a day."

(bias against young children) Maybe you are biased against people that don't live in the immediate area.

If the gold bar is an asset because it will eventually be sold for profit, then my home is also an asset because I will also ultimately sell it for a profit, or if I die prior to selling then my children will at some point sell it for a profit.There is no difference between the two, by YOUR original definition the gold bar shouldn't be an asset because it doesn't generate any cashflow, or by your new definition the house should be an asset because it will eventually be sold for profit. 

It would be nice to get my children into some fresh air for a healthy break.

We rent an AirBNB on the beach from a gentleman who used to own his own successful dental practice, and now he does AirBNB full time.