My advice will depend on what you want to be close to and what type of lifestyle you are looking for: access to schools, beach, work, restaurants, tennis, boating, shopping, grocery stores, etc.
Jupiter geographical areas that I think are accessible by foot include...
-NORTHEAST JUPITER: (Between US 1/Intracoastal on the West; A1A/Ocean Blvd in the East; Indiantown Rd in the North; Marciniski in the South) Walk to restaurants, grocery stores, basic shopping, gym, spas, cinema, public tennis, two tennis clubs, yacht club, beaches, Carlin Park (with guarded beach, walking trails, public tennis, boules, BBQs, and beach restaurant), kite surfing, surfing, and fishing...
-SOUTH JUPITER: (US 1 in the East; Military Trail/I-95 in the West; Donald Ross Rd in the North; Hood Rd in the South): shopping, restaurants, grocery stores, neighborhood pools, public golf & proximity to PGA Blvd.
-VILLAGE OF TEQUESTA: Walk to beach, restaurants, grocery stores, and basic shopping.
I have lived in this area for 8 years and highly recommend it!!
Please call or email me for more specific info.