Doremire and Ames, both of you paint a different picture, both bringing out excellent points. Can each of you briefly describe your operations?
Family business now retired from it.
Started in RV hauling with the usual sucker's recruitment in early 2008. New 2500 HD Duramax and got an immediate cost disadvantage of 10% lower MPG from the new emission systems on diesels.
Found out 'hook and tow' where you have a trailer or camper on a flatbed and also tow a trailer would have paid more, but, not advertised. Yes there are ways to make some money hauling RV's, but, it's not one at a time like they recruit for. No backhauls period.
Toured the USA and Canada, eh. Seriously I am just going to buy my own RV and enjoy it more. IMO the cost is the same as hauling them and you can stay and enjoy the actual RV as an RV vs. cargo.
Dad drove and I did dispatch, paperwork, and other business related items. I also drove some including split shifts later.
Watched The Great Depression V2.0 hit in 2008. Don't care how well you took care of things as no work means no pay and the fixed expenses don't exactly go away. Hauled dealer to dealer, repo yard to auction, auction to dealer, new rigs from BK closing dealer to auction. Was supposed to be factory to dealer, new.
Switched over to cargo on a daily parts and tire route. 550 miles a day 5 days a week. Delivered tires and auto parts including batteries to dealers, mom and pop tire shops, farms, mines, etc. Think UPS for auto parts. The pay/profit was better than hauling RV's.
Parts broker couldn't pay us for 2 weeks at one point. We stopped running for them. As reserves were exhausted from making it through 2008 there went the truck. 2008-2010 was survival period.
Broker finally paid us and then later in a weird twist asked us to haul for them again. Used the money they paid us to get an the 1993 ebay special, now the Rat Rod, and learned a lot about working a 6.5TD hard. Say like there is an engine working hard that can use more fuel than a 454 and go slower while doing so!
Paid fuel cash daily were our terms and they did it. Found out why they begged us to come back - another driver blew a $1000 TPIM, ECM, etc. on their Dodge diesel and couldn't afford to fix it.

Yeah ok a 6.5TD took over for a Cummins at one point in history.
Dad left at 2AM to deliver before places opened. Would get back at noon or so. I would take the truck trailer downtown in the evening and load it at the depo. Made sure the parts were in order on the trailer by stop. I would usually make it back before 2AM. Unless SHTF and others had trouble loading like blown airlines on trailer brakes etc. (You don't need glow plugs if the engine never completely cools off.) Work on the truck if needed in the middle of the night.
Blew the engine due to oil failure scuffing a piston. (Conditions caused the limits of the engine oil to be reached.) Rented a rig and swapped engines over 30 days.
Back on the road we hit a furry 1 ton pregnant rat, known as Elk. 3 weeks and 7000 miles on the rebuilt engine. Loose the route over that. New Dodge Diesel took over, better MPG and power than the 6.5. They paid us a week to ride along and show the new driver where things were at.
Buy truck back and rebuild it from insurance funds. Haul overflow now and then for broker.
Step back into hauling RV's from auction and enjoy a little profit as father/son for a short time. Drive Motorhome while pickup delivers trailer to same location and both ride back in empty pickup.
Spent 'profit' on new front end for Rat Rod. Write it off as a loss for that time anyway.
Find out where all the fuel is going on the 6.5TD. Send working GMx turbo to the scrapyard to be melted down. $700 large turbo upgrade takes towing MPG from 7 to 10.4 MPG. (Extreme grades on the route mean even a modern diesel is around 12 MPG.)
Fuel is a big expense. Biodiesel is a nightmare 10% MPG loss, higher expense, and that's when it doesn't foul things up with 'bugs in fuel'. Wallet catches on fire over that bad luck bill.
Go through IRS audit over business expenses. Waste of several days going over a wheelbarrow of receipts.
Have a rebuilt 24 year old pickup with 1/4 million miles to show for it. Not saying we had the best run business, but, a lot of good well run and funded businesses didn't even make it through The Great Depression V2.0 as long as we did.
IMO Hot Shot may have some money in it. Hauling cars is better than hauling RV's, but, not sure there is any profit in either.