I doubled my accounts this year as well. This is my 2nd year and first full season. I started in July of 2011. I also dropped some low end accounts and slow payers.
I wanted to add a riding mower but I don't think I can justify the expense just yet.
2007 Dodge Ram 2500 4 x 4
10x5 Open Trailer
Gravely Pro 250z zeroturn Mower
Ransomes Bobcat 36" Walkbehind
Encore Pro Series 32" Walkbehind
Yardmachines 22" Pushmower
2 Echo Trimmers
Echo Backpack Blower
Echo Stick Edger