But you are also doubling the number of tenants, chance of expenses, etc.   

I at one point charged tenants the first $50 of repair costs.

Plenty of people moving here. 

How would you make it grow the quickest?

Most of the big land wholesalers whole-tale the deals, meaning they actually buy/close on the land (using their own money or other people's money) and then list on the MLS to sell, because it is very difficult to find buyers without widely marketing it. 

I invest OOS, and I know I can outsource a Call center to get my calls and set the appointments with the sellers that are interested .

For the flip itself, this would mean a GC or better yet, have a crew there that can handle 60-70% of all the work meaning they are there working on it the day you close and stay there throughout the process till it's completed. 

I've been in this market for 7 years as a realtor and work about 40% of the time with investors. 

Specifically:Share your experiences investing in Knoxville.Recommend resources or tools for market analysis.Help me find off-market properties, turnkey rentals, or connect with wholesalers.I’m eager to learn from this community and collaborate with like-minded individuals familiar with the Knoxville market.

You have a lot of info on this page, but we have listed units like this before.