Rate per mile question

Hi everyone new to the forum. I work construction mostly around the state of Colorado. I have a 2016 3500 duramax. I have been moving equipment for the GC I do most of my work through. we have a 6 ton crane is about the biggest I pull but a lot of it is through the mountains. after I had to do some repairs I need to decide a better way to be compensated for hauling. SO

1. It is His trailer
2. I will still be getting my hourly wage
3. He pays for fuel
4. I get .66 a mile on my tax return being a 1099.

with those faceted in what do you think would be a fair rate to charge per mile to cover the ware and tear and operating cost on the vehicle and being to come out a little ahead to put some away for repairs that come up. after reading for a while is $1 per mile sound fair? again I don't really want to make a large profit of it as my wage is being taken care of just want it to be a fair number for the both of us to cover ware and tear and repairs as they come up.

Lets say we are going off of a hot shot rate of $2 what percent of that is
-fuel
-driver wage
- trailer expenses (water and tear, insurance etc)
I think if I can find those percentages I can get close?

Please let me know what you guys think