Do what? ??
I run an average of 2,500 to 2,800 miles/week. My line haul rate is 98cpm and I get FSC and stop pay on top of that. I'm clearing over $1,000/week and working half as hard as you do. I just took a week off and did not go into the hole. Had a couple of short checks because my time off straddled two pay periods, but I did not go negative.
I've had a few expensive repairs recently, but had money set aside for that. I lost road time as a result of those repairs, but I did not go in the hole.
If you're only getting 5.2mpg, either your truck needs some serious work or you don't know how to drive it. I don't have or do anything special and I'm getting over 7.