The word "profit" can mean many different things.
I guess the best example is say a newspaper or pizza business pays someone "mileage" to use their car to deliver newspapers or pizza...
Say they pay you 12 cents per mile you drive in your car. And say gas costs 12 cents per mile. You may think you are being fairly compensated to use your vehicle, but not so!
When you use a car, parts wear out. Then these need to be replaced. And this costs money. So there is oil, tires, and then replacement of mechanical parts.
A more accurate cost would be your yearly cost to maintain the vehicle, then divide that amount to a per mile amount. So say you spend $1,500 a year on maintenance (tires, oil, replacement parts). And say you drive 10,000 miles a year. That would be 15 cents per mile!
And this is assuming you would have the car anyway for your personal use and you would have to pay for it and pay for insurance anyway, so this is leaving this out.
Anyway you would be losing 15 cents a mile with just paying for maintenance.
If you were to NOT drive the vehicle, there would be $0 maintenance costs.
Now if the newspaper or pizza business was to pay for their own vehicles, then they would also need to pay for the car and the insurance. Say they bought used for $10,000 and insurance was $600 a year. And they kept each vehicle for 5 years.
Then the cost for the vehicle would be $13,000 over 5 years for the car and insurance. Then driving 10,000 miles a year, just the cost of the vehicle would be 26 cents per mile! Say when they buy a new vehicle, they get $2000 trade in. Then that would reduce the 5 year per mile cost to 22 cents a mile for the vehicle.
So...
12 cents a mile for gas.
15 cents a mile for maintenance.
22 cents a mile for the vehicle.
So if they pay you 12 cents a mile when you use your car, it is clearly not covering your cost to operate the car! And it would cost them 49 cents a mile if they provided the vehicle.
So keep this in mind with your logging costs. Equipment wears out and someone has to pay to fix it or buy new equipment when it wears out.
My chainsaw dealer says some loggers will wear out a chainsaw in two years. A 460 was around $800 the last time I looked.
So the question is... What equipment will you be using for this logging job and how much will it cost you to use that equipment for that job?
Then "profit" to me is income minus expenses.