I live in NH. I have a friend that takes bailed recyclable (Thank GOD for spell check on that one) cardboard from Mass to Waynsboro, OH for $1.35 then comes back with $3.00 per mile. He does this non stop. He does very well. That would drive me crazy. It's like non stop traffic the whole way.
Here is a quick and dirty example of the effects of more miles and how it changes your bottom line with regards to more miles brings your fixed costs down. Sorry, if I seem to be talking down to you.
Fixed costs:
Insurance is $5,000 per year
Truck/Trailer payment $9,000
Plates $1,800
Total = $15,800
Fuel is $4.00 per gallon at 6mpg
25,000 miles at $2.00 per mile = $50,000 Fuel cost=$16,666 ($15,800+$16,666)=$32,466 ($32,466 / 25,000) = $1.30cpm
100,000 miles at $1.25 per mile = $125,000 Fuel cost=$66,666 ($15,800+$66,666)=$82,466 ($66,666 / 100,000) = $.82cpm
So you can see the difference between how your cost per mile comes way down by keeping the truck moving. There are other factors like maintenance goes up but your still way ahead of the game.
Big carriers effect me by taking anything they can out of a bad area for next to nothing. It's because they want to keep the truck moving and lower their fixed costs. With a large fleet this is a massive savings.
Now, you can do the above example by lets say staying in a lane between SC and IN. Getting real good money going from IN to SC and just decent going back. Do that non stop like I do and keep the wheels moving and your sitting fat and pretty. Sit in SC for that extra $.50 per mile for an extra day and you've lost around $1,000 in gross revenue which you won't make up going back to IN and your fixed costs will go up also.