Looking to expand, need advice

[Blueskeeter03]

Gentlemen, I'm a small lawn care company, 3 employees, looking to expand into the fertilizing and spraying business. 8 years of lawn care but very little knowledge in the other feild. I'll have certification license by Dec. I would all advice on starting small, best equipment, chemicals, fertilizer, wet or dry? In other words I am a green rookie in this field and would appreciate your advice. Thanks, Blue