If you really want to expand past lawn mowing then i would go to an agricutural college. That would be the best way to really learn what the proper technique and certification for various landscaping.
2003 Dodge Ram 2500 w/ meyer 7.5
5x10 Top Brand Trailer w/ Jungle Jims racks
48 exmark tthp
Shindaiwa Hedge trimmer
Kaw. Back pack blower