The following things are absolutely nessicary: (I own the following plus a lot more equipment)
Mower- Bob-Cat 48" w/15 HP Kawi engine, belt drive, (walk behind) w/ Grass Gobbler catcher.
Blower- Back pack- Stihl BR 320 Walk behind- Little Wonder 10 HP.
String Trimmer- Red Max BCZ2600S.
All of the items listed above are really great, and I love them all!!!!!!!!!