Not trying to start anything, but as somebody who tried hard to get rich in the trucking business from 1995 until July of 2011; I wish people would try a business before they talk about ripping people off.
I'm sure if you own a machine shop you are quite tired of people who tell you have it made automatically just because you own a business. I own several different kinds of businesses involving heavy equipment and trucks, and my hobby is talking to people who own other types of businesses.
Let's start w/ your first assumption: That this truck is going to make an average of 59 mph. As you know in the machine shop, a lot of the cost is setup. The driver has to get there, load and chain down your machine. Maybe he'll have to find somebody to jumpstart it, or to air up the tires. Next he has to deal with the time lost at weigh stations, and mandated breaks. Hauling 92,000 lbs, he's going to be stopped and inspected and his paperwork checked at everyone. Most of them will fine him $100 for forgetting to dot an "i" in his logbook, or an illegible capacity mark on a chain, or anyone of a thousand other petty things.
Now lets look at fuel: you hear over the road van drivers bragging about averaging 7 mpg. Most of them don't even gross 80,000 lbs most of the time, much less the 130,000 you would weigh hauling a 92,000 pan. Also, a lowboy w/ a machine on it usually has the aerodynamics of a parachute. This fellow would be thrilled to get 4 mpg. There's $1 a mile right there, or at least $2000 for the round trip.
Now, let's think about tires: just count them up (hint: it's not 18) and multiply by $400. Tire life is not great at all in the heavy haul business, and you can't just pop in at a truckstop and think they will have your size in stock if you need them.
On the subject of permits, (and the sheer aggravation of every state having different rules about axles, pilot cars, and etc.) there are 5 states to deal w/ here.
If you are thinking of getting a tractor and trailer to haul 50 tons interstate, don't bother kicking tires w/ only $200,000.00 in your pocket.
On the subject of having your own interstate authority, I had it for 5 trucks, and you have never even thought about bureaucracy until you get in this business. You really almost need a full-time person to deal with it. That's why most O/Os are leased on to somebody.
On the subject of one way hauls: This is a very specialized business, and w/ what one of those rigs weighs, you can't just run down to the local mill and get a flatbed load, if you had the deck space for it. If a load can be divided, he CANNOT get a permit to weigh over 80,000 in most states.
I still have a 50-ton lowboy and a healthy tractor, but I wouldn't do that 4 or 5 days work for $3600 if I lived next door to you.
I hope I've opened your eyes a little without making you mad, cause I really didn't set out to do that, but you really don't know somebody's life till you've walked a mile in their shoes.
Good Luck, Mitch