The biggest factor is what everybody thinks their time is worth. How much will gas cost and wear and tear is easy to figure out, the amount of profit per time to get you out of the house varies by person, finances, and mood for the most part.



You should also take a good look at the place before starting to see what the odds are of you getting hurt, cut, or contaminated are going to be. I am sure people here have showed up to a place and looked around and said no thanks to a job that on paper looked profitable but on inspection looked like an accident waiting to happen.