Bought a Truck for private use

I have some mountain property to build on, but companies will not deliver (lumber, rock, block, etc.) to it because the road is quite steep. I thought I would solve the problem by buying my own truck. I got a single axel Freightliner 22’ flatbed with a dump. The truck doesn’t seem large enough to be commercial, but it is rated at 33000 lbs gross which is considered Commercial in Arizona and requires a CDL etc. I am a little confused about what needs to be done to drive it legally.
1) It has a USDOT # on the doors. One person I called at Arizona DOT said that I should cover it up since it will only be used for my personal hauling. Yet I read in this forum about someone that got pulled over because the officer could not see his USDOT #. What should I do?
2) Is there a requirement to have it safety inspected?
3) Do I need any type of permit other than normal MVD registration?
4) Am I required to keep a log book?
5) Do I have to do anything special if I want to drive it to another state?
6) What is the penalty if I get caught driving it before I get a CDL?
7) Would it be better if it was considered a Farm truck
Hopefully some of you real Truckers know about this. Thanks!