Prior to viewing with clients, I am usually have an idea of the general area, vacany rates, market rents, and property types that suitable for LTR.

if so where do you market your listing? 

Unless you spend money trying to find off market deals..

Also is it possible to ask the county to reach out to these lien holder and inform them this was a judicial sale and that all liens is cleared. ( assuming county has power to get rid of the lien in this hypothetical)

If I just make a single listing on FF for this 5/2 and say list it for $4000 / month (market in this area), how would I get 2-3 random nurses to commit to the property?

Look at their marketing strategy.

Those states could be nearby in your market area.  

DFW is an amazing market.

Thus more marketable.  

I'm happy to share my experience with this market if you'd like to message me to set-up a call.