Depending on what price range you're looking in, you might be a little tight on funds.

I was told by an agent Knoxville new build don't sell to investor because of limited inventory. 

But like most markets, it's getting increasingly difficult.Plucking something from the MLS is tough because there's not a ton of inventory.

Fundamentals change neighborhood to neighborhood (i.e. appreciation potential), inventory/absorption issues may exist, rogue city council members and/or registered community organizations can make neighborhoods less appealing with little oversight which impacts value and marketability.

Depends on really what you are looking for:-Speed - some HMLS can go "no appraisal" so can close very quickly and beat cash offers if you are in a competitive market to buy-Interest Rates - can range anywhere from around 8% to 13% (same with "points") but not usually as huge of a concern for flippers since the terms are so short-Leverage - depending on your risk appetite / capital - this is also a top concern for some (almost always over and above rates/fees) can see anywhere from around 80% LTC to even mid 90s LTC (including 100% of rehab budget)

Would the fact that our house is in the ~ $850k valuation range influence your advice? 

In areas like South DFW, challenges like limited inventory and high prices require creative approaches such as off-market deals, foreclosures, or properties needing updates.

My total expense ratio on each property I own ranges anywhere from 40%-50% annually, but I also self-manage and am not a slumlord (I am pro-active with maintenance, not reactive).

The pre-date was to discourage further unpermitted units be added to the inventory.  

When dealing with overseas buyers you want to Sort to their Specs within the price range you are selling.