You could try a different tactic and use the Natures Lawn products for this and your cost will be much less. There are also several selling points for using those products such as no broken sprinklers, phone lines etc. If this stuff works in the south that is all clay it will work anywhere.
Low Baller or Low Balling
A person or "business" that prices services with out thinking about costs (insurance, up keep, fuel, time to do paperwork....) You should know what your costs are and how many days/hours you can work per year. You should work hard and make a good living