I owe around 168k on my primary but the last appraisal about 1 year ago came in at 422k.

Congratulations on getting under contract for the duplex!

So many strategies available to you to start out with, a big part of it depends on if you are looking to be hands on or continuing to pursue other opportunities at the same time. 

also what part of columbus ohio is considered good, low on crime, fast developing yet still affordable to buy a house? 

But to answer your question why you still see so many active STR's on Airbnb in a restricted area, it could be a couple things: It could be a "hosted rental" meaning the homeowner is there and is just renting rooms on Airbnb.

It’s funny I joined Chads groups on Friday.

There are multiple potential strategies it's just really going to depend on your personal situation. 

Lenders will base their max LTV on the appraised value assuming positive DSCR.  

Now I'm wholesaling mobile homes on land and in parks. 

Have you run the numbers on MTR/STR to see if your cash flow improves?