In my market, we have a temporary ban on STR's, but my property is R4 zoning, so as restrictions get tighter, my profits increase because competitors drop out one by one.

For example did they drop off the rent or was it a maintenance call?

There are charts online that show what are acceptable humidity levels in relation to outside temperatures. 

We also started getting dropped contracts, which meant we were holding houses longer.

Canton is not too far but it's pricey for me. here's what the house looks LIKE (not the actual house)All our rentals are in the above mentioned areas, so it's super convenient to drop by to look at a problem or talk to a tenant.. 

If you do not make your guest's stay the best it can be, you will get a lower rating, and drop in rankings.

My home value dropped significantly, the military forced me to move, I couldn't sell it for what I owed, and I couldn't rent it for what my mortgage payment was.

looking at dozens of properties and being afraid of "making a mistake" doesn't do you any good - you are losing money by not having rents flowing in and learning from each transaction, and it is a sure way to have a realtor drop you like a rock.

I have been involved in various areas of construction for over 20 years, with the last 5 being primarily spent as a project manager in the temperature control (HVAC) industry.

Honestly with how much you probably made on the flip, it'll be a drop in the bucket. congrats!