Seeking advice from you pros!

I just signed my 2009 chevy 3500 uo with a locak hotshot company. I've been hauling with their medium duty trucks and heavy duty pulling flatbeds and sometimes a van.
They run one tons and even 3/4 tons with flatbeds and just bed loads. They want me to get a 40 flatbed or 35 w/ dovetails even though i already own a 25 ft that has been used by me to haul commerical loads (very nice trailer)
I've spent enough time in big trucks, even though it has only been 3 1/2 years! All of us drivers Class 8and under are usually home every night and rarely work on weekends so I love the overall situation here. I don't mind helping out with the big trucks but I'm "downsizing"
For those of you hauling 35-40 ft trailers with 10-14 in cargo how bad does it slam mpg?

Obviously it limits what I can haul but its also harder on the truck and will reduce my MPG.

A bit of background Ive hauled cars 6 car hauler and a Pete, my chevy with 4 car wedge even a 40 enclosed at times. All as an O/O but I've never hauled a 35-40 flatbed so I have no idea how back they will drag down. I assume it will be better MPG than with a car sitting over my bed and better than the enclosed but its also a lot of weight.

Any real world numbers would help me make this decision. I live in East Texas and most loads are loading within a 50 mile radius of the yard, the company has been in business more than 30 years and seems, thus far, to have a stable and loyal customer base.

Thanks,

Bryan

 

Also, I'm selling my wedge to offset the cost of the flatbed should I invest in a 40ft, so I will have a bunch of tire straps of all kinds if y'all know any car haulers.

 

Thanks D389 Yes the car hauler caught a ton of wind and was quite heavy. I'm looking at trading my wedge for a 40 ft with dovetails this week, also found a company that will accept my pick up bed plus $700 for an aluminum flatbed. I'm actually up and running now doing true hotshot with the pick up bed only. Hopefully, this works out I've made an agreement with my wife thks will be truckings last chance. Now that I'm an O/O again, albeit with a smaller truck, I think I will be happier. Driving for someone else just doesnt work for me!