Its hard to say how much you can make, most owners that ive talked to and driven for paid by the mile depending on what freight paying on any given day it was a 60/40 split with driver getting 60%and i paid fuel he paid all other expenses at that time I was making about 1.45 per mile with the surcharge.
Another option is he pays you a flat rate per mile and he pays fuel as well as other expences,but if he is going to look for loads and keep you busy that great if he has the truck leased to a carrier then you have to rely on them to get you freight sometimes you may sit for long periods of time.