Looking for Advice!

I have more questions than answers.
Is it just you alone?
Do you already have the 3/4 ton truck?
Will you be on the road a lot, or staying at one place for several months before going somewhere else?

I've never had a toyhauler, but had 2 truck campers, a motorhome and two 5th wheels. I've never noticed a toyhauler as short as 30ft. My perception is they start at about 36 ft. I would look at used ones. New RV's have incredible depreciation. You should be able to find a very nice used "upper end" one for the same price as a junky new one. All Rv's are junk. Some just worse than others. Forget the 3/4 ton truck. You will likely need a 1 ton dually.
Last advice...don't believe the salesman.

Look around the internet to get an idea on prices:
pplmotorhomes.com
rvt.com

I would start at the ground and work upward to the pretty stuff you mentioned. Tires, brakes, axles, springs, frame design, floor materials, and then the soundness of the box itself. The RV manufactures know that they can cut corners by installing the cheapest parts because many just look at the bling.

buy a good used one,there out there,just look. plan this out , and you,ll find a very nice rv.

I don't think a 3/4 ton truck has any advantage over a 1 ton single rear wheel .... both are the same price but the 3/4 ton is not designed With rear springs to carry any more weight than a 1/2 ton. After choosing the 5ver you'll know if you need a 1 ton srw or 1 ton dually. How much of your money can we spend?