My property taxes in Indianapolis metro area (2.77% and 2.78% for different counties' rates) increase with no limit (confirmed with agents and local investors) vs.

That's just not the case.Industry is also becoming increasingly diversified.

In addition, the housing markets in many parts of the country have been increasing steadily, if not briskly, for almost a generation without any significant re-alignment to the underlaying economic reality.  

Yes, additional expenses for MTRs include utilities, wifi, landscaping, consumable supplies you provide for your tenants, additional insurance needed for a furnished home, and if you are hiring anyone to help with the property if you aren't self managing.

True .. but these are the two county I confident about market and it’s my neighbor county.. any advise on any small town or county that has potential or growth.

I'm not a realtor but I have seen some Realtors do the following to really increase their business significantly coupled with somethings that I do personally as well.1.

That a 63% increase from last year!

I'm assuming it was too high, but I didn't see the sense in coming down as I knew I would be going down to MB to make some improvements, so a small rent wouldn't have been worth it to miss out on improvements for the upcoming high season-this coming September I will be ready to advertise for MTR and confident that the place will look Up to snuff!

All of this has lead to lower crime rates and increasing property values.

Adding self-management, like @John Underwood alluded to with the Enemy Method, will improve your revenues as well.