1960 gmc 4000 grain truck

[jesdude7789]

I tried searching for a bit on here to see if there is a forum section for the medium duty trucks but only saw a couple decade old threads. I'm buying an old grain truck that runs and drives but needs brake repair and new tires. My plan is to use it for personal purposes like fetching steel beams and pipe, maybe some dirt/sand since it has the grain bed on it with tilt function. Not trying to max out the GVWR it has of 19500 lbs (13500 after truck weight factored in) and I will maybe carry 2000-6000 lbs on the bed at a time.
Current issues to figure out:
1. Reasonably priced insurance. I don't think i can claim farm/ag use since I am not using it for that and I only have two acres in texas. My first estimate from my current insurance priced it higher than the personal coverage I have now on 3 regular trucks, so that stinks.
2. Modern single piece wheel and tubeless tires that are not outrageous prices.
3. Where to source the brake parts, drums, wheel cylinders, pads, wheel studs

Also, anybody have pictures and projects like this going right now?