Do you have a pesticide license? Those things open some doors. Also comes in handy at aeration time when you can sell fertilizer to go with the seed. I have only been doing this for a little while now, but I have noticed there is a second surge of homeowners who are looking for an lco about this time of the year. (atleast in my area) So hang in there. Craigslist is good free advertising spend some time on how your ad looks and sounds. separate yourself from the crowd.
Have a nice yard...No sweat!