Quoting Landscape Management Magazine:
"What's your salary? Based on their work with over 50 companies across the country, the consulting firm of KehoeGuido found that owner-managers in high profit companies under $3 million in annual sales are earning combined salary (pay for managing their companies) and dividends (pay for return on ownership investment) at a rate of 8% of sales. In other words, in a high profit $2 million contracting business, the owner-manager grosses $160,000 per year, of which $100,000 is salary and $60,000 is dividends."
If you follow the average, than you'll need a company that grosses $625,000 to pull $50,000 a year salary.