We can do our own roofs if needed.The insurance premiums were subsequently reduced significantly, 

just like here in Portland, mo"any inexperienced flippers will chase thinner and thinner margins the longer the market stays strong and they don't discount properly for the risk premium of a possible downturn.

He will get pay of his labor at premium but he needs to take out loan out to get equipment and materials (at 0%APR through State deal).

Dan D. looks like i'm a bit south of your neck of the woods.  

Common tips are do not use flat paint so walls can be cleaned and replace carpet with tile and wood when it needs it.

You've got a good start in terms of your general criteria, but like @Kevin Wood said, you'll want to get a bit more specific and focus on a certain area(s) to get to know what's available / moving in that part of town.I've written more detailed posts about this in the past, but what I'd recommend is searching for brick 3/2/2's and larger in established areas zoned to good schools.

If you prefer to purchase a property with market rents or completely vacant, you will pay a premium.

High end brands that charge a premium for their goods or services would not operate in low end markets and vice versa.

I'm in your neck of the woods, and also buy and hold, do new construction, and some commercial.  

We have the opportunity to buy a wooded lot on a cul-de-sac in Blount County very cheaply.