Cover plantings

I am looking to plant some sort of Native Warm Season Grass for deer cover on my property. I cannot seem to find them online in bulk, and when i can they are like 15$ a pound. What kind do you recommend, and where can I get it cheap?

 

Plot 1 makes Cluster Duck for a screen cover

 

I'm looking something that I can plant a field of and/or thicken existing areas and will just give the deer more security, and hopefully bedding as well.

 

I'm considering Egyptian Wheat but would rather plant native...

 

Plot 1 also makes a mix called blockade which reaches heights of 6'-8'