Emerson.

Well, I think a Salary is the best one. Because then you know how much money you'll make each month and can budget and stuff. Instead of have money in the bank that fluctuates. Like, one month you have (not realistic) 60,000$ so you spend it all and then the next month you don't sell anything. So what do you do? You starve =) Not really... But it's better to know what you're making, when you make it. So you can manage your money well. Plus, it would be harder to take out a loan or get a mortgage if you say "Well, sometimes I get some money and other months I don't..." the bank is more confident in you when you come and say "I make 60,000 dollars a year"